I also find the endless arguments hilarious, as do a number of people I've met inside SRT. Without going into enough detail to break NDAs, I'm considered an expert in my field and I have provided specialized technical training to many automotive and industrial facilities over the years, including the SRT facilities near FCA HQ (about 20 minutes from where I live). I've spent plenty of lunch breaks shooting the breeze with the staff, and this issue of whether or not a Scat Pack should be considered an SRT is a casual debate inside SRT as well.
There are plenty of insiders who don't consider SPs to be SRT vehicles for the same reasons as outsiders. There is more "SRT Technology" in a well-optioned Scat Pack than there ever was in any SRT8, and the SPWB suspension now gives SPs a level of suspension performance not available on any SRT-labeled vehicle. How can the SRT brand be synonymous with top performance, if the top-handling suspension in the platform isn't an SRT vehicle? Keeping the SPs off the SRT roster also keeps insurance rates down and makes the cars more accessible, by reducing the total cost of ownership without lowering the price.
This is why I find it so funny when keyboard warriors are declaring what is and is not an SRT vehicle, like they have some secret knowledge or authority. At the end of the day, you people are picking fights over decisions made by the marketing department. The SRT tech in SPs doesn't make your HCs or SRT8s any less special, and neither does anyone putting a SRT decal on one if they want to. You should be more concerned that my SPWB will out-handle a SUPER SPECIAL OFFICIAL SRT HCWB OMG any day of the week, even if you can kill me straight-line.