Yeah, booted just fine.
I just found out something.
Background: I'm a little ... ornery, if you will ... about file management. I hate having the same file lying around in multiple places. But I also hate having to go digging many levels deep for files. So, I've developed a system that works for me.
I have files that are slated for permanent storage in folders that make sense. For example, one of my 1 TB Seagates (don't start - we've agreed to disagree about them) has folders named Android related, Storage, and several other folders. In Android related, I have folders for Android Studio, Apps, Devices, Misc, Motorola, ROMs, Root, SamuriHL (yes, you!), SuperSU Installers, and TWRP images.
In devices, I have a device name listed (whether it be by user, such as my sister, or it be by device codename, such as Taimen or Shamu) and in these folders I have several other folder,s usually the following: Drivers & Binaries, Full System, Internal Storage, OTA, ROMs, TWRP, and βeta. As you can guess, each of those folders stores different files, mostly stuff I get from Google for the images, and such. Now, since I have these in the device specific folder, there is no need for me to have them again in a higher tree - so that's where I use symbolic links to link these files to the folders more easily accessible (and thus leaving me with much less typing when using CL).
So, naturally, in F:\Android related\TWRP IMages\ I have a symbolic link to "F:\Android related\Devices\Taimen\TWRP\twrp-3.2.3-1-taimen.img", as well as other files.
Turns out, fastboot has no issue when I used "F:\Android related\TWRP images\twrp-3.2.3-1-taimen.img" as the path for boot TWRP - it booted right up.
However, when I tried to use symbolic links for files to push to the device when in recovery using adb push, adb was not happy about it.
Not.
One.
Bit.
If I navigate to the actual repository and use the file's full path adb has no issues pushing the file - but it won't work with symbolically linked files.
I suppose that I could try a hardlink - but, why? - if I delete one hardlink all of them go, right? That would be a PITA for storage, because I tend to keep multiple version of files, particularly when dealing with βeta releases of things like root installers and Android versions....
Oh well.
I think that I am going to let my computer install the latest Windows IP 20H1 build 18860 while I go about setting up my phone on Q DP1 again, and call it a night. Even with my nap, I'm feeling tired, for some reason.
Lights out.