I have a gorgeous 70s Marshall slant 4X12 with G12M-25 Greenbacks, all it does is provide a stand for my 100W Marshall Vintage Modern and the fine covering of dust it has accumulated. I have not needed to switch it on for years except to profile it. Both will eventually be sold; the Vintage Modern when the prices rise to their inevitable end value as it WILL be collectible, and the 4X12 just gathers more value so no hurry there.
I had a Marshall 412 100w with Pre Rola Greenbacks for years. Never liked it but I only paid £80 for it in the late 80's so I used it like you (a stand for my Dual Rectifier at home.
Finally sold about 10 years ago and bought a PRS DGT with the proceeds 😁