No harm indeed.You could set up an N26 and a Bunq as backups. Even if you don't use them at all there is no harm as they have no fees. I use EBS as my main account. I use it similar to how you use AIB. EBS are a pain and their systems are archaic but I have it set up in a way that I never really need to log in. Wages go in, rent and savings go out. I use Revolut for day to day spending.
Revolut, N26, and Bunq seem to be the main digital banks people are using.
If you (or anyone else on this thread) has a referral link for N26 and/or Bunq I can use that to sign up.