Several key points to digest:
#1 The AHJ makes the call. Local authorities can choose to adopt or reject any NEC guideline.
Only if it is adopted into law, is a local AHJ able to enforce his wish? Some states that have state wide codes do not allow a local inspector adopt his own codes as Indiana is one such state, actually in Indiana there is no local AHJ as the state building department is the AHJ.
Any EC who does not take the time to look up the laws of their state as for the enforcement of building codes is doing their customers a disservice because they are allowing a self centered AHJ to enforce codes that are not required and can cost the customer more money in some cases., Illinois doesn't have state wide codes but I thought Wisconsin did???
From some reading of Wisconsin law I'm finding it also has these same requirements as Indiana, that the local inspector also has to enforce code as adopted by the state and can't be in conflict with the state code, and find no such change to the allowance of using stab in connections to receptacles and switch's?? you can read your state law here:
WISCONSIN STATUTES AND ADMINISTRATIVE CODE RELATING TO ELECTRICAL
See 316.004(2):
(2)?Municipal authority. Municipalities may exercise jurisdiction over inspection of electrical construction covered by the scope of this chapter. For public buildings and places of employment, s. SPS 316.920 (2) specifies the conditions required for municipalities to exercise this jurisdiction.
SPS 316.004 Note Note: Section SPS 320.02 (1) (a) prohibits any municipality from adopting an ordinance establishing restrictions on the electrical construction of one- and two-family dwellings covered by the Uniform Dwelling Code.
SPS 316.004 Note Note: Section SPS 361.03 (5) (b) prohibits any municipality from adopting an ordinance establishing restrictions on the electrical construction of multifamily dwellings as defined in s. SPS 362.0202.
As I found in the Wisconsin's law a local inspector is just that, like Indiana he is not an AHJ as it is the states department that is the AHJ in this case.
#2 Backstabbing is a terrible practice for three good reasons. They are as follows:
backstabs are UL listed for 15 and 20 amp circuits for switch's and 15 amp circuits only for receptacles as some years ago UL made the manufactures of receptacles reduce the hole diameter of the backstab to only allow #14 awg
a. The spring-loaded clips on cheap residential grade receptacles do not make very good contact, which could cause arcing or nuisance AFCI tripping
See above
b. Should the neutral continuity be interrupted. We all know what happens when you touch an open neutral when the circuit is under load
Or an open hot but if done correctly why should it be a problem, it is users choice
c. Code allows for 15 or 20A receps. (residential only) to be installed on a 20A circuit if there are more than one recep on the circuit, but if the current passes through a 15A-rated device, the tap rule does not apply. You would be allowing 20A to potentially pass through a 15A-rated conductor.
All 15 amp receptacles are UL rated for 20 amps pass-through including GFCI's and is why 15 amp duplex receptacles and switch's are allowed to be used on 20 amp circuits, again the above answers is what the code making panel will use to shoot your request down.
I myself will not use the backstabs for receptacles even though I pigtail all my receptacles, but where I know the load like a switch is feeding only a few lights or a receptacle is feeding a small fixed load then I have no problem using them, the only place where I have ever seen a problem is when someone uses an electric space heater or other high wattage appliance like a hair dryer, in these cases not only do I pig tail but I wrap the wire around both sets of screws on the receptacle giving allot more contact area for the wire, never had a failure when done like this.
As for the Wagos (stab in wire connectors) go again it depends upon the load as for a single or even a couple fixtures I have no problem with them but if each stab has several fixtures on it then I'll use a wire nut.
As far as changing the NEC I'm not for it as I like the flexibility to wire as I chose, we don't need any more design codes put into the NEC as we have far too many now.