As noted recently, we (Comcast) will soon begin L4S testing with customers. We’re working on our test plans now. So my offer here is to let me know if:
1 – You have test probes you’d like us to deploy. We are working on a plan to send out (1) University of Chicago NetMicroscope probes and (2) RIPE Atlas probes.
2 – You have web-based tests you’d like people to run, or have one-click install client for Mac or Windows. (Most testers will not be technical enough to run CLI-based tests, the the exception of the Apple network responsiveness test.)

Thx! If this is of interest, please ping me 1:1 off-list.
Jason

Current list
(1.a) Ookla web-based
(1.b) Ookla client
(1.c) M-Labs NDT
(1.d) Fastly web-based
(1.e) Netflix web-based
(1.f) Waveform web-based
(1.g) DSL Reports web-based
(1.h) Apple Network Responsiveness test