Short question: I searched the Internet everywhere but found nothing. Can I buy games physically as a disc and still play without a drive? My thought is whether there's a kind of serial number with which I can then load the game from the store? Often the games are cheaper in the trade than in the online store, so this question.
No, I do not think so. Then you would get 2 games for the price of one, because the discs are always the same.
That's why I would advise against any of the X1S All Digital.
Not everyone would advise against the X1S Digital, because gamers are not the main target group. The X1S is good for people who want to use an X-Box for multimedia and do not want to collect movies on Blu-Ray or DVD, but also occasionally want to throw on Forza. But if you gamble a lot, I think I'll invest in a "normal" one or the One X anyway.
No, unfortunately that will not work.