Typical final console price drops before next gen?

[Raconteur]

For those of you with years or decades of experience, in general, when are the last waves of official price drops for console hardware before [soon after] the next gen of devices arrives?

I'm referring to the drops in the regular manufacturer list price (or if different, the regular price seen consistently in stores). So, this is not about special promotions like Black Friday or store-specific sales.

Is the drop usually following the next-gen console announcement, when it goes on sale, a few months before, a few months after? With previous generations, how has this played out?

In the current gen, I'm surprised to see that PS4 Pro is still holding on to a fairly high list price despite the next gen being right around the corner. At least here in Poland. PS4 Pro 1TB premiered here for around 1799zł back in 2016, and today big box stores often carry it for around 1699zł (-5.5%). Of course you can be patient and hunt for sales, but I still paid 1349zł (-25% from the 2016 price).