Yes I have, worse performance on my main rig due to LTSC still being on 1809 and having no Ryzen topology awareness, and performance improvements within margin of error on every lower end device I installed it on, including an Intel Atom laptop.
The marginal performance increases sure are worth sitting on an outdated edition which you'll have to do a completely clean install if you wanna upgrade it to the next edition when it comes out in 2094.
Well yeah.
I am using LTSC but have actually already decided I will be replacing it on my gaming rig. I am ok keeping it on my laptop.
My reason for using LTSC is I feel the upgrade policies for normal versions of windows are too frequent, its nothing to do with performance.
The next LTSC is coming out this year which I have been considering, it will be based on 21H2, the problem with 1809, is it "just missed" out on various new features that appeared in 1903 such as TLS 1.3 support, WPA3 support, RT 1.1 support, and tamper protection on defender. It does support directML but gpuz dev's seem uneasy in adding the tickbox for it in gpuz, so thats misleading (I think they checking win build instead of presence of directml libraries).
21H2 variant of LTSC should be DX12 ultimate complete feature wise, and I expect anyone using that build of LTSC will be fine for a few years at least as DX work should slow down now, but the concerns are going to be DirectIO which I think will come just after 21H2 as well as the store rehaul.
The good news is on the non LTSC of enterprise, and windows education each H2 release is now supported for 30 months, which I think is a lot more reasonable. Updating to a newer LTSC is about ÂŁ300 (I feel like I am one of very few who actually paid for LTSC, the most popular forum of LTSC users hosts activation bypass apps), the non LTSC enterprise forget about buying it as an individual, however my sister is a student so I can get hold of an education license. It is a shame they dont offer pro users the education update policy.