Bytecoin blockchain isn't stored in memory  too
enormous and lot means nothing...

I have asked you WHAT significative feature they have added. The wallet doesn't even have a block explorer a base feature included in Bytecoin since the start and is slow to start and use much RAM.

Effective usability? Only a single darknet store accepted them and this probably because of very aggressive marketing not because of some new feature. Bytecoin was always a lurker, with not much promotion while Monero staff spend more time on social and advertising than to code is not surprising this but has nothing to do with what I'm stating here.