It really depends on your discipline. Powerlifting really starts at 100kg of weight on a barbell, and many need more than 200kg of weight on a bar to perform their training. You could keep healthy with a home fitness regime, but you'll lose some of your total strength, and you certainly won't be progressing.

That's all I'm trying to point out, for many disciplines there is no substitute for equipment. But so be it, these are unique times.

Body weight exercises can be great and useful in maintaining a certain level of fitness, but you're very limited in the ability to increase your muscle mass using them.

Muscle mass gain is a weird luxury anyway; what's important now is to maintain your fitness level, moreso than looking swole.

Calisthenics moves on the other hand require an enormous amount of strength and muscle control, something you can't gain from "just" lifting weights.

I see. Here our opinions diverge, because I believe muscle mass is not valuable by itself. I prefer to have a more athletic looking, performant body.