It'd be pretty sweet to be able to include a short message with your transaction. While I guess this message would be pubically readable (i.e. in the blockchain) it'd be good for reference numbers and the like. There's no reason why this technically couldn't happen right?
Can't wait for this. Yet more blockchain bloatware. It is almost 1GB now and that is HUGE for some people like me. People in LEDCs where the net is limited will not be able to afford to download this big a blockchain and yet you propose even more data in it

Does not make sense to me.