What's a recommended USB drive for a dedicated Windows 10 boot device?  

16 to 20GB would be an average install size.

I've been playing with NVMe drives in USB-A or USB-C enclosures that support USB 3.1 or 3.2 with good results. I've got SSDs from 256 GB (paid about US$50) to 1 TB (paid about US$140) at my disposal. The smaller size is enough for 25-30 various Windows ISOs and toolsets; the larger one will handle up to 100. Ventoy really is a game-changer.
HTH,
--Ed--

Hello @EdTittel,

EdTittel said:

I've been playing with NVMe drives in USB-A or USB-C enclosures that support USB 3.1 or 3.2 with good results. I've got SSDs from 256 GB (paid about US$50) to 1 TB (paid about US$140) at my disposal. The smaller size is enough for 25-30 various Windows ISOs and toolsets; the larger one will handle up to 100. Ventoy really is a game-changer.
HTH,
--Ed--

I agree. I actually made a post in this thread about it [ Post #4 ].

EdTittel said:

I've been playing with NVMe drives in USB-A or USB-C enclosures that support USB 3.1 or 3.2 with good results. I've got SSDs from 256 GB (paid about US$50) to 1 TB (paid about US$140) at my disposal. The smaller size is enough for 25-30 various Windows ISOs and toolsets; the larger one will handle up to 100. Ventoy really is a game-changer.
HTH,
--Ed--

Thanks, Ed. I had considered an NVMe drive last year but paid a little more for the Corsair GTX, as I wanted the high portability with solid cap seal. That's dedicated for large file transfers between devices and backups. I had also picked up a Kingston A400 2.5" 240GB SSD SATA 3, for just $30. The casing is nicely done so it doesn't need an enclosure, but of course it requires a SATA adapter to use (instead of USB)... and read/write speeds clock at 22/29 mbps respectively. Do you have a link to the NVMe drive builds you've done?

Also, thanks for making your blog available -- just checked it out and I'm learning a lot there. Ventoy is the really big eye opener. Powerful stuff!

@cytherian: if you run these canned searches at edtittel.com and win10.guru, you'll find most of what I've written about NVMe drives and messing with Ventoy. Hope this helps you get where you'd like to go. Feel free to PM me if you have specific follow-up questions. Cheers!
--Ed--