I forget how much it costs, something like $350/year from memory, but it's a no-brainer if you are developing for Windows, as you get access to loads of software, including Visual Studio, Office, something like 10x Windows desktop licenses and 5x server licenses, $100/m Azure credits etc.
I think the only thing it still has going for it is that it doesn't really change all the time. Oh and you can probably still install updates whenever you actually want to, because it's meant for production systems.
The old LTSB of Windows 7 was indeed a really nice, light and no-frills windows release but LTSC has become almost the same turd that Windows 10 has :(
21H2 version is bloated compared to early win10 LTSC builds.
There's so much telemetry and so much Windows Defender bullshit, which is extremely hard to get rid off, but slows your system down tremendously.
I can only imagine how bad full non-LTSC version of windows is like.