Off-the-shelf CRMs are a great starting point precisely because they force very little customization up front. That same strength becomes the problem once your process has matured past what the tool was designed for.
Your team is building workarounds instead of using the tool
When sales or support start tracking the "real" status of a deal or ticket in a spreadsheet next to the CRM, that is a clear signal — the tool no longer models how the business actually works, and people have quietly stopped trusting it.
Every integration needs a workaround of its own
A generic CRM ships with generic integrations. If connecting it to your billing system, your support desk, or your product analytics requires a chain of Zapier steps and manual reconciliation, you are paying an ongoing tax for flexibility you are not actually getting.
Reporting requires an export, not a dashboard
If getting the metric a stakeholder actually cares about means exporting to a spreadsheet and building a pivot table every week, the CRM has stopped doing its job. A system built around your specific pipeline can surface that number natively.
When this is true, custom-fit usually pays for itself
None of this means off-the-shelf tools are bad — most businesses never outgrow them. But once you are maintaining workarounds for the workarounds, a system built around how your team actually sells, supports, or delivers tends to pay for itself within a year in time saved alone.