Martin Tournoi, the developer of GoatCounter, wrote an article explaining why he chose the EUPL licence for GoatCounter. It provides valuable insights and a useful comparison: https://www.arp242.net/license.html
Other people might see the above as an advantage, as you can dual license and those who do not like AGPL can buy a commercial license.
He has misunderstood the AGPL (there is no requirement to send changes to the original developer, only make them available to users).
His modification of EUPL is to explicitly remove one of his advantages, by reducing compatibility with all but two (AGPL and OSL). h It looks like his EUPL is not compatible with the EU's EUPL as a result of that modification, and the only way to mix the two would be to license as OSL or AGPL.
Very annoying to modify without renaming.
So then for people who are living inside EU it is a good ideal to use this license instead of AGPL if they don't want their code ended up in some transnational big corp for example?
EU based big corps will be fine with EU jurisdiction.
For those that had never heard of it:
GoatCounter is an open source web analytics platform available as a free donation-supported hosted service or self-hosted app. It aims to offer easy to use and meaningful privacy-friendly web analytics as an alternative to Google Analytics or Matomo.