That is a solution. Haven’t really seen any comprehensive labels that would clearly indicate all the capabilities of the cable. Maybe there’s a thunderbolt logo, maybe 100W is written on it? If you’re lucky. Definitely can’t have both at the same time though. I guess that leaves me with approximately zero cables I’ll be buying in the future.

Have a look at this for instance. If a charger manufacturer can’t be bothered to put any useful labels on the cables, what do you think anyone else will do?

It’s a 60 W cable, so how about you write 60 W on it, so that the people who bought your 100 W charger won’t be disappointed? Too much effort, I guess.