From the opinion piece:
Last year, I pointed out how many big publishers came crawlin’ back to Steam after trying their own things: EA, Activision, Microsoft. This year, for the first time ever, two Blizzard games released on Steam: Overwatch and Diablo 4.
That was back in 21. Last year’s numbers posted in May 2023 have them making a profit.
source
It’s worth buying from them every chance you get. Even if they disappear you will own your games so long as you can store them, unlike every other store front, steam included.