Street Fighter doesn't scroll fast, so you can make do with 50% reduction in MPRT, e.g. 8ms MPRT. That remains reasonably clear for 60Hz motionspeeds up to 4 pixels per frame on OLEDs.
The neat thing is that maximum BFI allows 60Hz to reach the motion clarity of max Hz.
For example:
Software BFI+120Hz = 60/120ths motion blur ~= 50% blur reduction
Software BFI+240Hz = 60/240ths motion blur ~= 75% blur reduction
Software BFI+480Hz = 60/480ths motion blur ~= 83% blur reduction
As a rule of thumb, frame-level BFI (no sub-refresh BFI) is motion clear up to (2xHz) pixels per second.
60Hz = clear at up to 120 pixels/sec on OLED
60fps on max software BFI at 120Hz OLED = clear at up to 240 pixels/sec
60fps on max software BFI at 240Hz OLED = clear at up to 480 pixels/sec
60fps on max software BFI at 360Hz OLED = clear at up to 720 pixels/sec
60fps on max software BFI at 480Hz OLED = clear at up to 960 pixels/sec
This is the same as:
120fps 120Hz OLED = clear at up to 240 pixels/sec
240fps 240Hz OLED = clear at up to 480 pixels/sec
360fps 360Hz OLED = clear at up to 720 pixels/sec
480fps 480Hz OLED = clear at up to 960 pixels/sec
LCDs will start falling apart on this curve when you're above about ~60-240Hz (ish), depending on LCD model and LCD performance. OLED keeps improving almost perfectly linearly thanks to GtG=nearly 0.
This applies to the scaled pixels, so this is less important for lower retro resolutions (big pixels), than for high-resolution material.
This is epitomized that max BFI at lower frame rates, via
software BFI means, can only reduce motion blur to match the match the motion clarity of the maximum framerate=Hz, e.g. see
TestUFO Variable Persistence BFI viewed on 120-240Hz. You can see that the bottom two UFOs has identical motion blur when you view this test on an OLED of 120Hz or up. Now change the speed of the UFOs, then motion blur can come back when you're faster than the thresholds above. 960 pixels/sec has noticeable motion blur on 120Hz OLEDs, for example.
That's why 60fps via BFI on 120Hz+ is good enough for most low-resolution retro material (slower than a running Super Mario, slower than Sonic Hedgehog run). But starts to fail with higher resolutions such as DOTA2 map panning (lots more blur due to higher resolution of panning a DOTA2 map) since higher resolutions = more pixels of motion blur = Hz limitations more noticeable.
Sub-refresh BFI or strobing (e.g. flashing a refresh cycle briefer than a refresh cycle) can reduce more motion blur, and a few OLEDs sometimes do it (e.g. LG CX model, or Oculus Rift OLED), but not all OLED models can do sub-refresh BFI. So these are good rules of thumbs for BFI performance.