How long will games appear on XBOX One?

How long will it take until the Xbox ONE S or X support is discontinued in terms of games?

So I read that the Series X / S games will be compatible with the One. That means the whole Series X / S games will be compatible with Xbox One (S / X). So games will be released for at least 4 years.

Microsoft initially guaranteed it for two years.

I doubt whether it will stay that long due to the lack of graphic brilliance in titles appearing on Series X.