Arkless Electronics
Trade: Amp design and repairs.
The mistake is thinking of "ceramic" as a single type. Avoiding them entirely just because some types are unsuitable for some applications is throwing the baby out with the bathwater. By the same logic, electrolytics should be shunned too since they are polarised and blow up if used incorrectly.
No mistake. I'm not writing here for other engineers and a comprehensive discussion of X7R, Z5U etc etc, piezo electric effects, temperature and voltage dependency of capacitance and which specific applications they can be used for is beyond the scope of this.