But you will have limitations and a non-custom GUI. I'd rather download a fast add-on instead of simply nothing.
a surprising number of blockland players dont know how to install addons, especially new players. even given instructions on how to do so, there's still a non-negligible number of people who still can't figure it out.
couple it with the fact a lot of people cant click links in bl and that basically turns off anyone who's not joining the server specifically because its RoB. its honestly best to have both systems available - let people play it in a reduced capacity initially and if they really like it, end up downlaoding the client addon after askin admins why they can't do this or that.