The idea is simple: Z as the zoom key sucks, you can't conveniently press it like you can press C and it's even worse on laptops. However, despite its flaws? It avoids the #94 problem by being in a spot that nobody really uses!
Does this mean I'm gonna rip off old OptiFine/Zume? Nah, once again, Z sucks unless you're a weirdo like me and uses Colemak-DH adapted to the ABNT2 standard; thanks to the ISO key shift, it not only makes typing nicer, but it also makes Z occupy the ISO key!

The idea is simple: Ok Zoomer will stick to C as the default key bind, but an interesting idea would be to prompt the player if they want to keep using C and unbind the "Save Toolbar Activation" key or if they want to bind it to <insert ISO key here>; This prompt should not interrupt anything and should only be done once, while the option to choose between one or another should always be available in the settings.

This idea should be explored further and said key should be tested as much as possible before it can be trusted as a decent default key for ISO/ABNT2 keyboards

Dismissing this idea, pressing <insert ISO key here> is nowhere as comfortable as pressing C; oh well, looks like we still have the conflict problem on our hands!