for regulated devices educate yourself about PWM devices
you wont get TC but there was vape long before TC
These devices are simple The chips are lost lasting. With a little soldering know how and a little research you can repair anything on one yourself for a few bucks or have someone with a little soldering knowledge fix it for you every part of it is inexpensive form $1-$8 for most parts in one the boards are usually under $20 but rarely need replacing and the shells themselves are under $20. A great one can be built for around $70ish in parts so you can build one yourself with a little research and soldering and be your own lifetime warranty. Plus for a few dollar syou can have spare parts laying around.
Because no matter the future of vaping every piece of a PWM device with the exception of the 510 and the fancier SMART PWMS designed for vaping, everything n one is used for other electronic purposes, so they arent going away except to be replaced with better or similar parts
MOst good modders sell nice well made long lasting PWM mods for $125-$200 some are pricier, and if your like me you can search around and get lucky and pick the occasional one up pretty cheap. Blems, overstock,returns, etc
unlike say a IPV device which within a year or so you would be hard press to find a replacement board and those are usually only available for their highest end board at the time so not all are replacable.
A DNA board may last a long long time, but what happens if they go out of business like Provari did?
for limet ime length of a mod you need mech, for regulated, you might get lucky with the right one, but who is to say which one that is. For something you should be able to repair for the rest of your life and be low cost PWM.