Pretty much everyone has self-driving tech, even non-car companies like Apple, Google, Dyson (though they stopped). I think the likes of Toyota could have produced a car similar to a Tesla a decade a go if they wanted. I reckon they could produce a Tesla tomorrow if they wanted. Same for Honda. BMW with Bosch also has some great tech. Bosch especially with cornering ABS (for bikes) on and motorcycles that can't crash.
Who has self driving tech that is polished and market ready? Where’s the Apple and Google car I can buy? The Dyson project never got off the ground properly- it was hugely over ambitious, a failure and they know it.
Newcomers from Faraday Future (toast) and Karma (rumoured to be considering filing for bankruptcy) have struggled.
Your comments about Toyota, Honda, BMW and Bosch are way off the mark also. Only Honda and BMW have electric cars you can buy today. Honda’s has only just come to market and is more of a novelty than a serious volume contender.
Both Japanese companies led the way with hybrid tech, but have squandered their lead. BMW’s i3 has sold comparatively well, but is old now (introduced in 2013) and even the largest battery only gives a 150 mile range.
You’re underestimating the difficulties in maturing the technology, and also the past (present?) reluctance for large car companies to make the required transition. They’ve gifted Tesla a massive head start despite all the headwinds, which they shouldn’t have allowed to happen.