All the 18650 Sofirn tube-lights get very hot and the v1’s can be truly dangerous, but the v2 claims to have active thermal regulation that steps in at 60C (140F). That’s pretty warm, but it shouldn’t start fires and 60C is considered safe enough for “brief contact”. I’m not sure if anyone has actually tested the v2 thermal regulation or not, but I think active regulation is a must for retail lights like these.
This is why I like recessed switches. Brands like Astrolux and Emisar generally recess their side switches and sometimes even surround it with a raised shroud that helps provide tactile feedback for finding the switch in the dark, though a lighted switch is helpful as well.
A latching tail switch serves as a partial lock-out, as well, and the lighted ones are especially nice.