Iota coin has long established itself in terms of reliability and stability. This coin has long been in the top of the rating, I have it myself and I advise everyone.
Interesting, I heard quite the opposite, that Iota had a rough time, issues with the development of the tangle, the wallet did not work for ages. Richard Hart had an interesting debate with Ivan van Tech about that.
Did they? I only know the video where Richard is ranting about even solved problems without getting into technical details or a real discussion at all.