I'll worry about it once a notice appears on the Mullvad blog. Or once I find something in their privacy policy (which I haven't read since a while)
Until then I see no reason to reduce my security or browsing speed, which means I'll continue with Vanadium together with Mullvad VPN.
It also doesn't make sense to make users worry about their VPN service and then recommend some VPN service in the >same< Article 🤪