With regards to tracing eBPF has actually moved at a fairly brisk pace the last year or two and it will probably take a while for the documentation and knowledg

With regards to tracing eBPF has actually moved at a fairly brisk pace the last year or two and it will probably take a while for the documentation and knowledge to permeate. The usability side you mention is what Brendan's suggesting is worth porting from DTrace, just the front-end that the users sees. That would just back onto eBPF and the user would know little different.