I've got the GoldenGate 486slc 50MHz bridge board card with the 387 maths co-processor & FDC chips installed (with the optional Monitor Master), ISA video card, & an ISA network card in my A4000. I've also got Windows 98 installed on it. It runs a whole lot faster than PC-Task 4.4 or PCx. I would say that I does run at an acceptable level for the CPU it has on the bridge board. I think that by having an ISA video card, the speed increases.
On another note: I had installed Windows95 on PC-Task ver. 4.4 on my NTSC A1200 with a Blizzard 1260 CPU accelerator. You need the patience of a saint to complete the installation. It took several hours to complete. I wanted to install Windows98 on my A1200, but never got around to doing so. You need to enter some parameters to install it so that it bypasses some stuff, which I've forgotten now. I'd have to review that to remember what it was, but W98 could definitely be installed on PC-Task ver. 4.4. W98 is the latest & last version that I know of that could be installed on PC-Task ver. 4.4.
I have a similar setup A2386sx upgraded to 486slc3 75mhz, 387, cardinal VGA/SCSI/Audio board, ISA ethernet, and Kurwell IDE/SERIAL/Parallel board in a A2000 with all the ISA slots upgraded to 16 bit.
The 486slc is basically, 386sx on with 486 instruction set and bigger cache on a 16 bit bus / 32 internal. Most were frequency double or even tripled. This chip is quite nice when compared to a 386sx, but it really cannot hold a candle to the 486DX or DX2/DX4.
By the time Windows 95 came out Pentiums 100mhz+ were out.
Windows 95 (which needs a 386 min) and Windows 98 (which needs a 486 min) will certainly install on these configurations, but alas they are already slow by the time windows 95 came out. Certainly you could do regular "windows" tasks with these configuration, but certainly not any real gaming or anything too taxing.
An example of a test I did, this was in the late 90' something like 97. I bought warcraft package with warcraft one, warcraft II , and the warcraft II expansion. What was nice about warcraft series is that they were on hybrid disks, that could be install on both a PC or a mac. I ran warcraft II, (a SVGA game) on my (at that time) A3000/040 25 mhz both with the with the A2386 with the 486slc3 bridgeboard and on the I think either emplant pro or an early version of fusion. Warcraft II installed on the A2386 486slc configuration side but was so slow that is was basically unplayable. whereas on the mac side of this the game played smoothly. The full 68040 consider roughly equivalent to the 80486DX (I know we could get into a lot of controversy with this statement, but is not the point of this reply.) I am not going to pretend that this was a accurate test, but roughly a practical comparison.
Now as for the original warcraft, both ran smoothly.
It is my opinion (opinions are a dime a dozen) that the 486slc bridgeboards (with a VGA card) make a super windows 3.11 with workgroups computers and can handle games from from the early 90's extremely well. It can run windows 95/98 and do basic tasks well enough, but choke when you throw anything semi hard at them. Eitherway it is fun just trying to get them to work with either configuration.
My friends thought it was just crazy that my A3000 could run AmigaOS, Windows 95 (yes I has 95 on it to show off), MacOS (probably 7.6.3 at the time), and NetBSD. It was nice to have this configuration at this time as I was a graduate student. In trying to write my thesis I needed data from MatLab (primarily a mac product at the time), early dos data acquisition computers, Mac office computers, and Sun Unix workstations. It was also nice having NetBSD for its LaTeX support as many theses were written in TeX at the time.