Every guide, comparison and detector run we have published under proxies.
Public data collection and logged-in account work want opposite things from a proxy, a browser and a budget. Buying one tool for both usually means overpaying for one job and underserving the other.
Any page can make Chrome download gigabytes of on-device AI models, once per profile, through that profile's proxy. The two obvious switches either change what the page sees or keep the download and stop security updates, so the fix went into the engine.
Residential is not automatically better and datacenter is not automatically dead. What actually decides the outcome is whether the proxy is bound to the identity, and most setups get that part wrong in a way that is easier to detect than the IP itself.