Can I safely install Windows 10 on the entire internal SSD on a T2-based Mac (mini) rather than splitting the drive space between macOS and Windows? Is there a particular method for this that I should use?
I have a 2018 Mac mini. I opted for a model with a small internal SSD as Apple's SSD pricing is ridiculous. (I also upgraded the RAM to 32GB myself for the same reason.) After some wrangling with the T2's secure boot peculiarities (it seems you have to install macOS from the recovery environment; running the installer app from the App Store results in an OS installation that this Mac won't boot from.), I'm now using macOS from a 2TB USB 3.1 external SSD instead, which cost less than 1/5 of what Apple would have charged me for that capacity.
I'd like to occasionally boot Windows on this Mac as well. From past experience, attempting to boot Windows from a USB drive is not worth the trouble, and Thunderbolt drives aren't entirely straightforward for this purpose either. Plus, they're comparatively expensive. I'm not using that internal SSD at the moment though, so that seems a good place to keep Windows.
I've read a few horror stories of people apparently bricking their T2-based Macs by wiping the internal SSD though; keeping a small macOS installation around on the internal drive and only using part of the SSD for Windows is certainly possible, but it'd be much nicer to just use the whole thing for Windows and not constantly be fighting for disk space.
Is that possible? The Boot Camp assistant obviously won't let me do it directly, but can I safely wipe the drive from Windows setup and use the whole thing for Windows anyway without the T2 going into lockdown mode? Or should I be going about this some other way?
Note: Based on the responses so far, I feel I should point out that I'm definitely not a Mac newbie, I'm familiar with how I would do various Boot Camp, partitioning and OS setup tasks on older Macs. (And I happen to write Mac device drivers for a living.) The T2 security chip in the 2018 Macs and the iMac Pro significantly complicates matters of booting, even with secure boot disabled. I'm looking for answers about T2 based Macs specifically, from people who have practical experience with such Macs.