When I first vaped, the commercial equipment was crappy, and you had to build yourself to get much of anything reliable.
Now there is a huge amount of equipment out there, almost all better than what was around just 5 1/2 years ago. However....
We may be quickly coming to a time where, thanks to our governments, the equipment could become a narrow selection of crap again.
I built before, and altho I don't want to due to time, I can again if needed...I throw away NOTHING. Dead ego/evod battery? It has threaded connector on top which could be modded on to something else. I've taught myself to re-coil evod/PT coils. Broken tank? I save the parts from it.
I am happy my recent budget has allowed me to stock up on supplies to vape comfortably for a long time, and maybe I'm paranoid (but I have company!). But I haven't always had as much income, and maybe I will regret throwing stuff away in the future; if I don't need supplies then maybe I can help others with them.
One little tackle box full of odds and ends doesn't take much space, and could be worth a healthier life for myself, or some one else.