I've been doing a lot research on GDPR impact and implementation with GTM-GA for clients, but it's been 12 months since GDPR has gone live I haven't found anything on how GA traffic has been impacted if users don't accept cookie consent. However, I'm personally seeing GA accounts taking huge losses in traffic since implementing GDPR cookie solutions (because GTM/GA tags aren't firing until cookies are accepted).
Is it common for websites to see significant decreases in traffic due to too many users not accepting cookie consent? Are there alternative solutions to avoid traffic loss like that and still maintain GDPR compliance?
It seems to me that the industry underestimated how many people won't accept cookie consent. Most of the documentation and articles around GDPR's start (May 2018) didn't foresee or cover that aspect properly, everything seems to be technically focused with the assumption that if implemented properly most people would accept cookie consent, but I'm personally not seeing that trend and it's destroying GA data (lost traffic, minimal source attribution, inaccurate behavior data, etc).
Thanks.