On the one hand, they have proven themselves in the past with things like working with the community to get Android 10 ported to the Fairphone 2 [1].
On the other hand, they always seem to be pretty behind on security updates. They got particularly eviscerated by the GrapheneOS project lead [2].
My hot take is Fairphone is a pretty small company that is trying to fill too many niches at once. It's great that they're working on making the supply chain for gold less awful ([3]). It's also great that they're continuing to prove that repairable / user-upgradeable flagship(-ish) phones are possible. I originally chose Fairphone for those reasons, because they align with my values.
Ultimately, though, I want a phone that I can rely on to be rock solid, secure, and highly usable. It's the thing I carry with me everywhere and rely on in emergencies, etc. To that end I recently ordered a used Pixel 6 Pro and plan to switch to that + GrapheneOS in the near future. I hope that Fairphone continues to succeed and help reform the (completely awful, IMO) mobile handset industry.
[1]: https://www.theverge.com/2021/11/23/22798512/fairphone-2-and... [2]: https://www.reddit.com/r/GrapheneOS/comments/10b5x4n/has_any... [3]: https://www.fairphone.com/en/2021/11/30/fairtrade-hirose/