Unless things change drastically in the industry that might take longer than you think. Here's a (log-scaled) chart of Mac base RAM sizes per SKU over the last few decades:
As you can see the rate of increase dropped off dramatically in the past 10-15 years, with 8GB being a common size since ~2012 (compare that to the rate of change from 2002 to 2012). Workloads just aren't getting more RAM-intensive in the same way as they used to be, maybe because so many libraries and websites need to optimize for phones with 2 or 3 GB RAM.
Back a few months when it was the 10th anniversary of the first retina MBP, I thought it'd be fun to look back 10 years to see what people on the forums were saying about it at the time it came out. Can you guess how many posts from 2012 I saw complaining that 8 GB of soldered RAM was unconscionable and would be obsolete in 2 or 3 years' time?