Recently, due to GDPR, WHOIS records for domains have been redacted in many places and access to the information that has been relied on by investigators and abuse fighters is either much harder to get or simply unavailable. In theory, ICANN should be setting up a gated system that will give tiered access to various classes of people, but having participated in those discussions, it does not seem such a system would allow for access to the data we need to investigate, correlate, and respond to abuse and cybercrime.
Article Link: https://isc.sans.edu/diary/rss/25108