Pixel 5 is still solid. I skipped the 6 because of comments on HN, but I'll probably have to update to the 7 when it comes out.
In the meantime, I'd also like to try the Librem 5 US. This thread is convincing me to give it a shot anyway.
No, the 3 was abandoned a little over four years after its release.
And the more relevant date: not even 2.5 years between the Pixel 3 being the actively promoted flagship device and being declared obsolete by virtue of dropping security updates.
Anyway Pixel 3 has very low RAM (4GB) as a 2018 Android flagship (even not good as a mid-range). It effectively decreases lifetime.
Yes, if you install LineageOS... I like my Pixel 3 except for one thing, the fingerprint sensor appears to be defective, sometimes it works and sometimes it doesn't (bought it used on https://swappa.com/)... it gained 30% in value since I bought it more then a year ago.
No - I have a Pixel 3 as well and the last uptime was last October or so