I'm on old.reddit.com too and I use the mobile app (including the 3rd party ones back when they existed) for one primary reason: Two windows I can quickly switch back and forth on. On my phone I use Reddit to look up things. I can have a Reddit thread on one window and a Google search on the other and go back and forth. In a browser switching tabs back and forth is painful, often reloading pages, losing the spot in the browser, having this url bar and top bar taking up tons of screen space.
I'm on old.reddit.com too and I use the mobile app (including the 3rd party ones back when they existed) for one primary reason: Two windows I can quickly switch back and forth on. On my phone I use Reddit to look up things. I can have a Reddit thread on one window and a Google search on the other and go back and forth. In a browser switching tabs back and forth is painful, often reloading pages, losing the spot in the browser, having this url bar and top bar taking up tons of screen space.