Both the S20 and the MFR ESC’s are being replaced.
The S20 is still available, but will be replaced in approximately six weeks with the new S22, which is an updated, uprated version of the established S20, so should be good! The price will remain as the S20.
Also, the MFR is to be replaced with immediate effect by the MFX. This has a couple of new features, and better still, a slightly lower price!
There will be a new ESC, the S10, which will have brake & reverse light capabilities. More info on this, price etc. as I get it!