This is bad advice that is being repeated over and over by the so called tech influencers. You go to an older version that only got security updates so you will lack optimizations and features already in the current stable windows 10. And for the foreseeable future you gain nothing at all. If one day the normal version acctually stops reviving security updates, it almost certainly will be possible to switch the update channel to LTSC and get the LTSC updates that way but for now this is not needed and the switch is unnecessary Also without some trickery, switching to LTSC requires a complete reinstallation, which for most people likely wasting sever hours.

Linux is free and less wasteful on resources on the other hand.

We had a PC that came properly-licensed with that edition of Windows (with the matching sticker and everything), and it didn't work out as a desktop machine for the intended user. It's been a year or two and some details are lost, but IIRC there were issues with some Intuit program or other.

It was probably something that could have been worked around, but workarounds tend to pile up and become difficult to track. I avoided the problem by putting a more-pedestrian version of Windows 10 on it instead.

You can continue using normal Windows 10 if you have a Microsoft account attached to it. They give you the option to sign up for free extended updates (until 2027).

Well, not just anyone can buy a license for it. You need some sort of enterprise volume license agreement, as far as I can tell.

Current trends indicate that regular Windows 10 may as well.

Does that support modern gaming?

Also MS go to great lengths to make the secret good version of Windows (It honestly is very good, I'd put it up there with Linux Mint) very difficult to buy. So just torrent it. It's bad enough running Windows let alone giving money to MS.