We have made electrs the default for Dojo on the Community release. If you do not have very deep wallets (deep means many derivation paths which are sub accounts samourai and ashigaru make to deal with things like post mix or bip 47 tx's etc.), then electrs is a great choice.

Benefits to fulcrum is that it is the most performant indexer. Downside is possible DB corruption, which isn't the biggest deal. Just a hassle to uninstall and reinstall.