Well the idea is to open a channel large enough to sustain usage. Lots of people want to have a decent size channel. 

Are RoF still a thing?

We had user built out rings of liquidity for people to join. 

The idea nowadays is you can splice in and out liquidity based on your needs. It's just a single on chain tx instead of 2. One to close and another to open. Splicing is just one of chain tx. Iirc.