I honestly don't know. I'm sure it's a lot. I currently have the following consoles still hooked up at my house....
- Nintendo Switch
- Wii U
- Super NES
I have a N64 but it's not hooked up and I'm not sure where it is. But I have about 7 or 8 games for the Switch and I have quite a few games for all the other consoles. I'll have to go count to see how many I actually have.
According to Steam its 434, many of which I got dirt cheap as part of bundles so they've not even all been played.
I don't know how many physical games I own, most of them are in storage so I couldn't even reasonably check.