I just switched from Transmit to ForkLift recently after the latter changed their SSH implementation from libssh2 to OpenSSH, making use of the default SSH configuration of your user.
This was the main reason to switch for me, as we use a ProxyJump at work and before this implementation change neither one of them was capable of this. However, due to recent changes at work, it’s now mandatory for certain projects (and the plan is to expand it to all of them).
Aside of that, I immediately noticed that browsing through a remote server is so much faster than before.
Additionally, it seems that ForkLift has a more active development cycle, already with support for macOS Tahoe.
The only thing I’m sad about is that there is no favorites importer. Seems to be a manual job, but for me, it’s worth the hassle.