The problem isn't limited to Memo. It applies to all BCH transactions. Make too many of them without waiting for the next block and you'll have the same problem.
For a regular user, it can hardly be a problem. We're talking of 25 transactions per 10 minutes average! Even if the block is late, it's still 25 transactions. When are you paying 25x?
playing a game. i'm definitely a regular user (non-dev). why does the limit need to exist?
Because transactions are processed by computers, and computers don't have unlimited resources.
you don't say? certainly the limit could be increased
It could. Miners can change it anytime they want. It's not even a consensus rule.
