I did exactly the same. I bought it and learned it while waiting for my Glowforge to arrive. And I still use it, too. (For all of my vector illustration work, not just with my Glowforge.) Very easy to learn, inexpensive at the time (now free in the form of the new Affinity 3 app), and unlike Inkscape it’s well-behaved on the Mac.
While Inkscape’s Mac version has improved massively in the last five years (no longer requiring X11, for example) it’s still very obviously not a native app (weird non-standard open/save dialogs, non-standard printing, weird keyboard shortcuts, etc.) which makes it more difficult to learn.
Now that Affinity is available for free (and finally has a tracing feature in version 3!) I find Inkscape difficult to recommend to Mac users unless they need some of its more advanced features (e.g., scripting). For the average Glowforge user, I’d recommend Affinity as the best free option on the Mac and probably the best free option for most Windows users, too. I do worry some about Canva possibly locking more features behind a subscription in the future and I’m a bit annoyed that it can’t export to Affinity Designer 2.x (although one can always do so via SVG or PDF if necessary). but overall I’m happy with Affinity 3. (I’ll keep my copy of Affinity 2 around just in case, though.)