“The majority” that misses the tabular figure option, will also miss the kerning option. If you design for the people who know and care instead of those who either don’t know or don’t care, your work will be of more value than if you aim at the least common denominator.
I was searching the forum for numeral metrics which is why I couldn’t find any info. For any other newbie that lands here I should have been looking for proportional vs tabular figures.