Client it is. Triggering people who get triggered by their public posts being public will come another day.
Client will be:
1) PyQt5. Cross platform. No Electron.
2) tabbed, QTreeView. Very high density. Should be unique. Meant for power users.
3) multiple accounts, of course!
4) Open a unified timeline, individual timelines, instances' public timelines, in tabs
5) Tor support, per-account
6) User agent can be changed, so nobody can punish you for using r000t's software
7) Requests?