Europol calls privacy-enhancing technologies, or PETS, the tools of criminals:
“PETs are used by criminal actors for secure communication, anonymisation, and protection of data. Criminal networks utilise various PETs, including end-to-end encrypted messaging apps, encrypted phones, and virtual private networks (VPNs), to communicate securely and anonymously. “
"For this reason, lawful access to electronic evidence has become one of the most critical issues for European law enforcement"
https://www.europol.europa.eu/cms/sites/default/files/docume...
Meanwhile Canada just banned e2e and Signal is leaving the country.