It's basically Windows 11 without all the bloat, spyware and other annoying anti-features. Switching from Windows 11 to Tiny11 took my 2019 ThinkPad from a boot time of over two minutes to under 10 seconds with all other performance aspects similarly improved as far as I can tell!
It's basically the best of all worlds as far as I'm concerned. And without financially incentivizing Microsoft to keep screwing their end users too!