What signal loss actually looks like
Browser restrictions, consent gating and ad blockers do not remove conversions evenly. They remove the ones easiest to attribute, which pushes reported performance down on exactly the channels that were working. The first symptom is usually a widening gap between platform-reported and CRM-reported revenue.
What server-side tracking fixes
A server container gives you one durable event stream, first-party context, deduplication against browser events, and the ability to enrich conversions with offline outcomes such as qualified lead or closed deal. Match rates recover, and the optimisation signal you send back to the platforms is closer to profit than to form fills.
What it does not fix
It is not consent laundering. Users who decline tracking must remain untracked, and building otherwise is both unlawful and commercially reckless. It also will not repair a broken measurement plan: if the events are wrong conceptually, moving them server-side just makes them wrong faster.
A sane implementation order
Define the conversion taxonomy, deploy the server container in parallel with existing tags, reconcile for two weeks, then cut over and enable enhanced conversions with hashed identifiers.