In general, I'm not interested in further support/improvements of RCKangaroo, but since it's open-source, someone else can do it.
My original goal was to share my method of solving ECDLP with best K.
I did it, but people (and you too btw) said that K is calculated incorrectly, also my method will not work in practice because loops cannot be handled properly and my method worked for puzzles only because I burned tons of money and any method is good in this case. So I also created RCKangaroo for 4090 to demonstrate that loops can be handled efficiently and K=1.15 is real.
Then people tried to run it on old cards so I had to support old cards too (and also to prove that loops can be handled efficiently on any GPU).
Right now RCKangaroo uses the fastest method for solving ECDLP ever, and also it's the fastest open-source GPU solver, so I think it's still good enough for open-source.
Yes sometimes you say that you have magic non-looping method with K=1 (DP>0) or that you have faster jumps like 13Gkeys/s, but it's just words, nobody can test or use it. Sometimes here I see funny messages like "I have broken EC" or "I solved all puzzles" 
At this moment, I have demonstrated and proved everything I want and now I'm busy with another interesting project.