You may not see assumptions nowadays because the rates are so low. The realtors & brokers here, if they’ve been in the field for more than 20 years can tell you if they’ve seen many assumptions in the past, when the rates were really high.
You may see, however a larger number of assumptions in a few years when/if the rates for conventionals FRM go through the roof – when people who bought in the last year or two are selling…