Slept on it, pretty sure I won't suffer from lack of XLR/DI on this notional low-watt, home practice amp.
No plans to do any recording anywhere, or use outside home. No DAW. Never used the XLR out on my SWR combo.
In the unlikely event I do end up needing to connect to XLR, as mentioned there are these:
https://www.sweetwater.com/store/de...-xlr-male-to-1-4-inch-female-balanced-adapter
as well as other ways to add DI/XLR. Sure, not as elegant as built-in XLR, but an option.
What got me thinking about it was, the Markbass CMB 101 Black Line 1x10 40W. About $50 less than the Fender Rumble 40, but it does not have a DI/XLR output. Local GC has both in stock.
No word yet on old SWR combo. I had some hope that the initial "5 to 6 weeks" estimate was one of those "underpromise, overdeliver" things, but it seems not.
Regardless of whether the SWR is practical to repair, I'm pretty sure I want to move it along out of my life. While I like the sound, It's SO dang heavy and such a PITA to move. Rather replace it with something more modern and much lighter, if lower watts. Can get a bigger combo amp later if needed.