Canon 70-200 F2.8 IS USM Mk1 vs Mk2

Yessir I totally agree but it really has way more than I need at this time and the overheating issue is apparently a very big issue. I just can't imagine why Canon would put a product out there like that. As an ex car dealer i know sometimes new first year models very often have issues and usually no one knows how to fix them either so I'm a little gun shy on the R5 for those reasons. It does appear more and more people moving to mirrorless so I may buy the 5Dmk4 just to have one really good FF non mirror camera to keep for ever lol. It does not look like the R6 has that issue or I have not seen that anywhere yet. Thank you