I'm pretty happy with this tech preview so far. After the original setup performance was very (very) good, but it has become part of my toolbox on the M1 MacBook Pro 16G since installing the Windows 10 Insider Preview 21277.1000 (rs_prerelease) that includes x64 emulation. My target was to run various copies of FileMaker Pro, MS Office and hopefully SQLExpress. Initially I failed installing FileMaker, but resolved this by removing all Microsoft Visual C++ Redistributable entries in the Apps & features list, then downloaded and installed the preview version of the ARM64 C++ redistributable from: https://aka.ms/arm64previewredist (FileMaker then subsequently installed its own 2017 version, but this has not caused any problems). Since then, nearly everything I've tried has worked. I have 3 copies of FileMaker installed, downloaded Office from my 365 account, some utilities such as S3 Browser and the latest version of Edge. So far it has been rock solid and I'm already starting to rely on it for cross-platform work. The one failure has been SQLEXPRESS 2019 and tools v18, which reported errors during installation and needs more attention or it will not work yet. Has anyone had success with this? The interface is slightly confusing as I prefer to keep my VMs independent of my Mac file structure, but I haven't investigated options as yet. Parallels is taking about half my RAM and the performance is pretty amazing. The only thing that has failed after installation was to create a PDF using any of the options in the print dialogue box, but this could have been down to the web page source.