Quick addendum to @PavelASamsonov’s thread:
Focus your #UX practice on methodology, not tools!
Adopting a new tool is simple if you have your design workflows down: explore the new tool, understand its limitations and new-to-you possibilities, and map your activities to its feature set — done.
If, in contrast, your process is deeply entangled with one particular tool — regardless of how powerful that tool is! —, and that tool is no longer available, you might just end up back at square one.
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