Fiji - many driver issues
Polaris > many driver issues
Vega64 > Many driver issues
>Radeon VII (Vega based) > many driver isssues
Could you be more specific? Or do you mean just the list of "known issues" that AMD (and NVIDIA too) post with each drivers' release? I had (along with my buddies, we tend to buy similar hardware) all of them aside Radeon VII and never had any serious issues with them. I had NVIDIA cards in that time too and also did not experience serious issues. Though, NVIDIA more than once released driver literally killing GPUs (that they quickly pulled removed soon after, though). Should I be worried my 3060Ti will melt too?
RDNA1 (rx5700) > huge number of driver issues
Agreed, though eventually they did fix them - but too late for me to bother, I switched at that point to 2070S. I then had issues with Youtube crashing for a few drivers' versions, though. Annoying but not game-breaking.
RDNA2 is a step in the right direction, but many have just lost trust in AMD and don't wanna take the risk.
People have voted with their wallets, more 3000 series cards have been sold overall, for a good reason.
It's not a loss of trust, it's the fact that even when AMD (4000 series etc.) had really good GPUs, NVIDIA had MUCH better marketing and still majority of the market. The rest is mostly FUD, not reality (aside 5700 series), that people use to justify their choice, whilst in reality most never actually owned AMD card and just heard rumours (FUD) spread by other people who never had such card either, etc. Once started, such rumours never die, irrelevant of reality.
In regards why NVIDIA sold more cards - discounting consoles (which also use RDNA2 and NVIDIA isn't even close to their numbers), AMD simply never produced (till now?) enough of them to be able to sell them in numbers anywhere close to NVIDIA's. Just last week I was able to finally buy 6800 XT, because they just weren't available anywhere since release. Would I buy 3000 series? After waiting months in a queue on a preorder, I gave up on that too.
Current market is hardly any indication of who voted for what - people just buy what they can buy, and I wouldn't be surprised if Overclockers sold by now more 6800 series (Gibbo said they have hundreds in stock now and more coming) than 3000 series overall. Simply because there's so many in stock and according to Gibbo, they sell very well - first time since premiere of current gen both by NVIDIA and AMD, I believe.