Was thinking this the other day. Having owned a few PSR's in my time as a youngster (PSR 500, 410, 520, 620 etc...) up until the PSR8000 before I jumped to Korgs I/Pa series. But when going back to Yamaha around the T3 era. Tyros started it's own line but the PSR's carried on, but as MOTL's?.. so were the Tyros' keyboards an upgrade from arguably the PSR9000Pro which was a TOTL PSR? If so, where does the PSR-S derive from, the PSR-740 line? So many PSR's that seemed to be both MOTL and TOTL's!! And the SX series now, if its not a mini Genos (which I think it is), then none of the PSR Sxxx were mini Tyros's either. Just trying to put some of this into context! Probably complicating everything lol