I don't buy that EVs are such a big jump in tech that auto makes can't quickly electrify their vehicles. We have actually seen the opposite, where it's actually Tesla who have catching up to do with regards to the rest of the car. I reckon Mazda is betting on buying the component or parts when the time comes rather than choosing to develop in house. If you look at the company itself, it doesn't really have any real competitive advantage in battery or electric motor tech so probably not a bad strategic decision. In all honestly they are probably waiting for Tesla to throw in the towel and license their batter/motor tech which is about 2 development cycles ahead of the competition.
Yes and no... Yes its true that its been readily available tech for sometime, but no in that there are still big investments required for any new conventional ICE model let alone a new drivetrain production. And it took Tesla getting together with Panasonic and making that first big leap of battery volume production to bring in efficiencies of scale and bring down costs. No one wanted to be that first mover when there was no real market demand.
Mazda is a relatively small company, and its strength has always been engine tech. The engineering prowess they brought to the Wankel was awesome, and their current Skyactive engines are the bleeding edge of conventional NA ICE (again, they made a bet against downsized turbos that everyone else was doing and they won that bet!). They have built an identity around it and that's their marketing schtick as well (zoom zoom).
Tesla tech is open source. No one is waiting for Tesla. Telsa's new factory in China will building bodies that are up to standard shortly - they learnt all the lessons on how not to do things at Fremont!!