My Galaxy S8 is starting to feel its age. After now close to 7 years of service, it's starting to show its limits. The usual problems: Battery getting weaker and weaker, generally slow (My once/month visit of instagram for example is... a stutter) and, mot simportantly, no more security update.

I'm tempted to switch it to GrapheneOS and continue but I'm really afraid some "official" apps won't work anymore (mostly banking apps).

In October last year I started my quest for a new Android phone with the S8 form factor, or as close as possible for pocket-fit.

I've checked the various guide on this community and came ouf with the same question I had while doing research on my side.

Contenders were:

Fairphone 5, which philosophy was extremely tempting, especially the "fair" aspect and the self-repairing capabilities. However, its form factor and what I heard about extremely slow patch/updates were the last nail in its coffin-size (161.6 x 75.83 x 9.6 mm).
Cosmic Dolphin (Link) was also extremely tempting (secure OS, mechanical switch for GPS/Camera/Mice...) but a new company means possible bancrupcy and no more security update, plus the form factor (159.7 x 73.3 x 7.8 mm) meant it was also a no.
Xperias 5V and other in the lineup seemed interesting, especially the SD card slot. But no info regarding software updates and way to expensive.

Only two made the cut and I have to choose between:

None have a SD card, jack socket or removable battery but it seems these features are becoming more and more of a rarity.

Both have a at least 4 years of updates still.

Galaxy S23

Positives:

146.3 x 70.9 x 7.6 mm
Updates for at least 3 years
128 / 256 Gb Storage
Cheaper now that the S24 should arrive soon.

Negatives:

~~Proc is a bit less efficient (meaning less time for the same battery size)...~~ Based on comments it may be the opposite, with the S23 being more efficient.

Pixel 8

Positives:

150.5 x 70.8 x 8.9 mm
7 year of updates
128 / 256 Gb Storage
~~I heard their Proc were more efficient than S23's~~ Based on comments it may be the opposite, with the S23 being more efficient.
Compatible with GrapheneOS (if test on my old S8 shows the important app I have still work there).

Negatives:

Google... Data leach amon leeches.
This insuferable camera bar on the back... Not really handy and will probably ruin a lot of pant's pocket.

I'm split between these two.

Would you have any advices regarding one or the other?
Points I haven't mentionned here?