Electricity prices are set by the marginal producer, which in the UK a lot of the time means gas turbines which are expensive to run. Which mainly means that the renewables plants are making money hand over fist, creating a big push to create more. It's only once that percentage grows enough that the price pressure will go downwards in general. (currently the UK is roughly an even split between gas turbines, nuclear/biomass, and renewables). You can already take advantage of the low price of renewables in some cases, though, if you have a flexible tariff and electricity demand (like a water heater, a house battery, or charging an EV), by drawing when the gas turbines are not necessary to meet demand.
The interesting part is that 130 Billion of the savings were in reduced gas prices as it reduced demand, particularly in winter, and freed up gas storage.
And this is depsite an effective ban on constructing onshore wind in England from June 2015, more than half the 2010 to 2023 time period studied.