Been hearing quick OS updates with project Treble for 6+ years now & no OEM has it as good as Pixel series. Lineage & PixelExperience ROMs are what's pushed my older devices to the latest OSes & be functional beyond manufacturers EOL
Pixel is the fastest device to receive latest version by definition. IMO it's not good characteristic for average user because some apps (that haven't tested with Android beta or slow to fix) tend to have problem when latest OS launched. It will be fixed within month, so delaying upgrade works. Anyway Android upgrade is no longer fun.
Absolutely. It's been ~10 years since I last had a phone that wasn't running Lineage.