> Unfortunately, Lennart has a fairly bad track record.
Well, Lennart always cared about having a working migration path. PulseAudio supports the old ESD protocol and features an ALSA plugin. Systemd supports traditional init scripts just fine, and the journal can be used via the traditional syslog(3) api.
Also, I'd say that having someone like Lennart who has the guts to try to get rid of some established but broken/limited practise is an asset, not a liability.