Not who you replied to but I haven't had any issues with a 3000 series card and LTSC, but I only used it for a whooping 12 hours since I got the card (I do 99% of gaming directly on Linux) so take my answer with a grain of salt.
I might be missing something but can't you just manually download the drivers from the Nvidia website on LTSB?
Alas, on LTSB now, the DCH drivers do not work. The last standard game ready driver that works with even GTX was back in 2021. Nothing works with RTX :c
You mean 2000 was the last tolerable version of Windows.
Everything since has been just the irritating pile of trash anyone doing anything decent with has had to put up with. Linux is nice to play around with but I sure the fuck have a long list of shit that isn't going to magically work on it.