Webcore/Pistons Will be going away soon when the Samsung hosted free groovy cloud goes away, probably within a few months.
For that reason, it’s better to do as many things as you can with routines in the smartthings app, since those are using the new architecture. Here’s the official announcement about that. (The topic title is a clickable link)
There are also some advanced options in the new architecture which have more features, and so are more like pistons, but they are still in development so they may not do everything you want yet either. The main one is the “rules API.“ you can read more about that here: