Apple sues Rivos, former engineers over alleged trade secret theft
appleinsider.com
appleinsider.com
For my money, it's Nvidia. They may have no idea how to ship a software product, and are fairly hostile to the open-source community at large, but quite literally nobody can compete with the performance they're shipping. AMD at the top of their game is still years behind what Nvidia is releasing on a regular basis, it's kinda absurd.
The M1 is neat, but most of it's neatness comes from being the first mass-market 5nm PC chip rather than it's technical merits (eg. ARM, big.LITTLE, high-speed memory, etc). Had Apple made the exact same device on 7nm or god forbid 10nm, the buzz surrounding it wouldn't be half as intense as it is today.
There's also grace hopper chips but I don't know whether they're really comparable to any of the M1 chips.