Loads of people I work with are still using phones from 2016 onwards many of which haven't had any serious OS/security updates in years.
Amongst the phones I use I still have my Galaxy Note 4 in use :s though mostly using 2020 stuff. I really struggle to find something which comprehensively replaces the Note 4 unfortunately due to a seeming fanaticism in phasing out things like plain, sensible aspect ratio, screens without silly edges, curves, notches or embedded camera pinholes, etc., 3.5mm jack, replaceable battery (interestingly the EU is voting to ban non-end user replaceable batteries in phones), etc. etc.