Honestly I love their hardware design. I think it's the best out.
But I love custom ROMs more.
If they simply opened up their devices I wouldn't care about how many official OS updates they offer, because I would be using a ROM that would keep constantly updating.
Although currently there's very little interest in ROM development for Sony phones. Kinda like the chicken or the egg.
Really just want flagship hardware with custom ROMs.
My OnePlus 7 Pro is still going strong, for now.
16? You only mention 1.