Yea, 1.8.0 won't work on the EX/SM anymore, I'm sure the MX's will follow once the 3.x version of the app is fully rolled out. I have a working version of the app with their new connection style, it just needs tweaking for public use and the experience now requires knowing the "sold date" for your vehicle so its much less seemless (although obviously more secure). I am still not to impressed with their approach, but it is at least significantly better than the previous design.
I'm quite busy (ironically contracting with another EV manufacturer) and spring is here so what free time I do have has been spent up riding. I'm somewhat waiting for later in the year when EU regulation 2023/2854 is fully rolled out, Stark will be legally required to provide some relatively open API/BT/etc experience for anyone operating the vehicles in the EU. I did reach out to them about this (and the weird cell groups issue on the MX) but I haven't heared anything back, seems they are much less responsive when they don't need things from you

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I suppose in some regards this probably means Svag will be dead for the moment, perhaps for some time. Personally I've just been using the stock app as I really just use battery percentage (and swapping charging settings), it is at least reliable enough these days if you leave the phone on the bike 100% of the time.