It's a simple thing to deploy, and is just an Electrum server. Basically just indexes the chain for faster access to the data your node is validating and storing. There's just a variety of Electrum server options these days, and some are bigger (for say, large nodes intended for large public use -- think Ledger or Trezor), some, like ElectrumX, also work with shitcoins (ew), and others stand out in their own way. EPS sounds great if it's JUST one person as it is a little faster and lighter, but Electrs hit the sweet spot for me.