That is the number one reason why I love VALVe for the video games that they develop and Blizzard Entertainment for the video games that they develop because they support their video game engines and their video games with patches to fix the video games and add new content and a lot of the content for free for 10+ years, probably even forever depending on situations.
World of Warcraft is going to be thirteen years old this year in November and Blizzard Entertainment releases small patches every week on Tuesday when they do server maintenance and restarts and releases new expansion packs for sale every two years.
VALVe still releases patches for the Source Engine and for Half-Life 2 and Counter-Strike: Source which will all also be thirteen years old this year as well. For the Source Engine and Half-Life 2 VALVe doesn't release as many patches every year for them as Blizzard Entertainment does for World of Warcraft, but at least one patch or so once a year. Team Fortress 2 and Counter-Strike: Global Offensive get a bunch of patches and new content released a few times every month to like every three months or so.
I really wish Bethesda Game Studios would take this approach, they can still develop brand new video games while still releasing patches for their classic old video games that they have released for sale already.
Blizzard Entertainment has World of Warcraft, Diablo III, Overwatch, and a few Free to Play (F2P) video games and Blizzard Entertainment works on developing patches for all of their video games and they will be releasing more brand new video games in the next five or so years for sale.
If Blizzard Entertainment can do it and VALVe can do it, so can Bethesda Game Studios.
Bethesda Game Studios can keep like five employees or ten employees to developing and releasing patches for The Elder Scrolls III: Morrowind, The Elder Scrolls IV: Oblivion, Fallout 3, The Elder Scrolls V: Skyrim, and Fallout 4 if they want to.
One intern from Rockstar apparently fixed a few bugs for the PC version of Grand Theft Auto IV like in December of 2016. Grand Theft Auto IV is nine years old this year.
I think supporting video game engines and video games, not necessarily with brand new graphics and resolutions, but fixing bugs and improving performance issues as much as they can that they should.
Bethesda Game Studios can fix a lot of bugs with The Elder Scrolls IV: Oblivon and Fallout 3 that PC gamers who make mods have fixed with the Unofficial Patches like Arthmoor and others do.