I would highly highly recommend ETL as service, after adopting it recently. It substantially changes your relationship with your data sources in a really positive way. And frankly, ETL for common data sources is code that you just don't need to write.

I would say that you should pilot with a few ETL vendors. We currently use Fivetran, they're fine but we've had enough burps that I cannot cold recommend them over other vendors. I cannot for the life of me remember the details, but I think we went with them over Stitch for pricing reasons.