"the problem is that it’s too designer-y for engineers"
Exactly! Numerous times I have wanted to start a new personal project however got stuck in figma designing process. Had no other chance except writing in pure html/css - the only things that still "work" for me unlike those stupid frameworks.
The "problem" is not figma. It is design in general. Everybody are coping each other which makes sense: You cannot copyright a design and also copying is much easier - and looks better - than designing from scratch.
However while designers will definitely think this as a "problem" which would kill creativity, I as an engineer think that it is the path that would happen later if not now. You can't really blame companies if they want to copy other successful designs - it works.
"being part of the root causes to 50% of all security vulnerabilities."
Truly an exaggeration. People really overestimate the danger of C.
"no one would nowadays embark on writing such a large system using C from scratch."
Come on, C is fast. C is not complicated. C has proven that it is reliable in recent 50 years. People don't like C because they can't do anything without their sweet language's garbage collector.
All of this algorithmic infinite-scroll tabs in social medias have got the idea from slot machines. Everybody are likely to become addicted to it, So yeah good idea really.