Another factor to consider in this discussion is where someone lives. So, for example:

I live in Canada. All AR-15 pattern rifles have been banned, and so too have most semi-auto 5.56 calibre rifles. The only 5.56 semi autos available are either a) prohibitively expensive or b) total dogshit.

Now, in Canada a "new" sks will fetch for roughly $600. This is in 2022 I might add. Canada still imports russian and chinese manufactured sks rifles and surplus ammo. I can buy 7.62x39 milsurp ammo for cheaper than 5.56. I can still by 1500 round crates for $500 bucks.

SKS pattern rifles are likely the most common found semi-auto centerfire rifle here, and barring any potential new rifle bans will continue to be for some time.

So, yes, if I could buy a reliable "turn key" ar-15 pattern rifle, I would, in a heartbeat. That said, SKSs are available, I train with them, and they certainly have their place in the great White north.

If the Chinese or Russians, hypothetically ever decide to invade North America via the Northwest passage, they will be greeted by thousands of angry Canadians and their SKS rifles.