While it's certainly not directly connected to the original R4, both (plus the r4i-dsn) are the only flashcards to have an official Wood kernel
Can confirm Wood's soft reset also works in some homebrews (not Moonshell 2.10 unfortunately but no huge deal, I have flashme)
And, I bought one of the last 100% accurate R4 clones two years ago - while it has the questionable "side grips" card shell seen on most of today's flashcards and not on the true R4s of their time, the circuit board inside claims to have been made in 2007!
Probably less than a year ago, maybe a year and half - I didn't compare the prices but it was at that time that shop01media delisted a lot of hopelessly sold out products