Here is my 2 cents, maybe I am wrong, but Taktik multiple times stated that he considers Renoise too old to get fundamental changes implemented. Maybe this was different, if Renoise was not kept so niche, agreed, but making it more mainstream seems to be not the wish of the Renoise team. I can understand that, because that also requires a lot more time and responsibility. Maybe this free time does not exist, simply.
Adding new engines to the sampler would require a lot of refactoring. Since Redux is totally dependent on the Renoise source, this is now much more work, too. And more risk to invest such an amount of time and energy.
Things like completely new sampler engines (“granular”), a pianoroll, or improvements in the underlying core system would require a lot of refactoring (e.g. MPE, sample accurate stuff, CLAP). Also the team has a strong focus on quality, so simply adding mathematical ringmod to the sampler would be experimental fun, but not very professional, since it is not that simple to implement properly, so not fitting the quality agenda.
Maybe we should focus on more realistic feature requests. Like parallel container … No, I guess that also requires quite a lot changes and API version bumping.
Would be indeed interesting how Taktik, dblue, Danoise and Achenar see the current situation and what their plans are…
As far as I can see there still is no competiting product at all, so of course I wish they would change their minds and jump full in. You see that potential, too, but they know for sure better than we do… Yes, open source it would be a dream, but AFAIK this also was not possible due licensing stuff or so…? Maybe only parts could be open sourced, like the GUI and underlying logic, but the dsp stuff kept into a binary library?
And then there could be two versions, free version without any dsp or whatever, and paid version, both including open source additions.