E-visa will be introduced at Thai embassy in Germany soon (22nov), so for me the decision is easy:

35 EUR for a tourist visa for 60 days online (and not taking up space in my passport) versus
1900 THB (about 45 EUR) for a extension (30 days*) of visa exempt (30 days) and having to go to an immigration office and losing space in my passport.

The visa wins in all aspects (cheaper, don't have to go anywhere, takes less space in passport), same duration of 60 days.

*Special extension of 60 days for people unable to go home due to Covid still available according to pong's post above, but I read somewhere that you have to get a normal 30 day extension first.