I have asked Krum to work on this, but this hasn't been confirmed yet. I also hired another developer I tasked with this and already is working on it, because I prefer not having just one person on such an important one.
I have no intention of leaving s2Member without a way to get paid, and will do what is necessary for things to work. I took over this project to make it better, not to neglect it.
There are several reasons why I haven't made a new release of s2Member sooner, but I won't go into them because don't like making excuses. I did address with fixes what was urgent and couldn't wait (e.g. Auth.Net's MD5 change).
Right now SCA for PSD2 compliance is my top priority. I still have to attend the support and work on other things in the meantime, but I don't forget that one.
There are several things needed to complete this upgrade, that's why it's not something I can put out quickly, but it's being worked on now, months in advance, so we can have it in time.
Having said all that, the decision of waiting or changing plugins, is not mine to make.
I hope that puts you guys at ease a bit, that I haven't forgotten about this super important upgrade.