Another day, another name collision; portmaster is also the name of a FreeBSD ports management utility that's been pretty widely-used for well over a decade now
If it’s actually widely used then I’d have heard of it by now. My suspicion is that it’s widely used in a specific circle.
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We thought about a rebrand, but it's just way to expensive right now, as we are still bootstrapping.
I also don't think that there is an immediate issue, as both application domains and presence on operating systems don't interfere. If you think otherwise, please share your thoughts!