Camera built in spot meter

I shot professionally with an Olympus OM4ti for 10 years and I think I used the multi spot once or twice.

I found the OTF (off the film) reading of the 4ti to be very accurate.

As has been mentioned, it may have been unnecessarily complex and maybe just a selling/marketing feature.

While I have owned the Olympur OM-4 for decades, I cannot say that I found the need for multi-spot to be necessary all that often out in the field, but then again my 135 format metering practices have been different from medium and large format shooting! In part, I use 135 for more fast-paced shooting, and available light work, and multispot is antithetical to fast pace.
I have often used the brightness difference feature of my Minoltal Spotmeter F when doing studio work and setting lighting, to make sure my lighting fits within the brightness range capability of the offset printed page, and use incident metering to set the exposure.
And shooting neg and printing in the darkroom is also more conducive to use a multispot metering, than work with color transparency, and I had not shot B&W in a very long time before ownership of the OM-4