I am also hesitant about working (even free) third-party tools into my workflow. I have had the pleasure of dealing with these tools going belly-up (a couple just did, but they were important -not critical).
I use Xcode. Arguably, it's "free," if you ignore the fact that I run it on a $4,000 computer, but it is also the OS maker's tool of choice.
But each tool I add, each dependency in my workflow, is another rusty link in the chain.
I feel that we have gotten a bit too comfortable with adding ingredients to the stew.
A font isn't really that big a deal (unless you sell them). Things like documentation generators and linters, are more substantial (and I just had to remove both from my workflow, because they don't seem to have survived the shift to Xcode 15).