It's a hard sell. Another risk is that, after I've invested a lot in Dark, you increase your prices, and I can't switch because I'm dependent on your product. The switching cost would be rewriting my entire code base (my biggest investment).

I'd like to have the option to reuse my code to mitigate those risks. Two possibilities: a) If the Dark IDE and infrastructure were compatible with a common language, I could use "regular" build and deploy tools if I wanted (I'd weigh the pros and cons vs. your price increase), or b) if the Dark infrastructure had an open source API (not necessarily an open source implementation, but like what SQL is for databases, or the S3 API for object storage), I could implement my own alternative infrastructure or shop for one.

(a) seems difficult technically and (b) means risking commoditization on your end.