A recent ruling (namely the Schrems II one) makes it very complicated to host and process data in countries that we used to consider as having "equivalent" privacy protection. The most prominent of course is the USA, but the UK could be on the line at some point.

For now it has an "adequacy decision"[1] allowing such transfer, but future changes could threaten that, and activist such as Max Schrems would happily (and rightfully) attack this decision if it happened.

Schrems II might be a blessing in disguise for the European hosting/Saas/Cloud industry, we'll see !

[1]: https://ec.europa.eu/commission/presscorner/detail/pt/ip_21_...