@amszmidt @mgorny no, really no.
There's nothing of anything I've released myself for which I would be annoyed if someone included in a proprietary software.
This doesn't apply to everyone or to any projects, but mine are in that camp for sure. Trying to call up to emotions by saying "regret" makes you sound disrespectful.
@flameeyes @mgorny Maybe you will, I don't have a crystal ball .. but you make a similar argument I've heard over many decades where people regret that they picked a permissive license.