As many have said here, 100% text based games can be very slow. I used to play fully text based games on Maptool before finding Roll20, and game pace was invariably an issue. A big thing that would often occur in the games I've played is player attention, or lack there of. We've had instances more than a few times of a player or two is watching TV or playing something on steam, and only occasionally glancing over to see if they need to respond to anything. Games cna grind to a halt when you're waiting 10-15 minutes for someone to post something. On the plus side, RP can b a very deep and immersive experience in Text. Characters, their quirks, their mannerisms, their dialogue, and the world around them can really come alive in the written word, almost like a good novel. And some people, myself included, do find they can write certain types of characters far far better than they ever could acting them out in voice. RP-Heavy games run through text can be a very rewarding experience overall. Personally I prefer a hybrid of text and voice, and I've found it allieviates a lot of the pacing/game speed issues with full text. For the game I run currently, we are all on mics but do all the RP stuff in text. I've found it creates a nice balance, and you gt the full interactions of a gaming group hanging out together having a good time. As a GM I can manage the game, and talk things out with the group in voice, and they can ask questions or discuss things easily. Meanwhile the actual RP can flow smoothly in the text window, and, since everyone's engaged, and any questions on rolls or mechanics for an intended action are quickly addressed on voice, there's very little wait between posts (except when someone's writing a small book for their next character action lol) Ultimately it really depends on what you want out of a game. For me full text can never replace the experience of being on mics in the company of a great gaming group, but text for RP can really enhance the immersion of a good story and characters to tell it through.