As you can see in chart, first no inscriptions. Then it shoots up to over 2.4MB when inscriptions cause the blocksize to stretch. Now, this is a double edged sword.

Casey made the image inscriptions fit in the witness data area NOT to take advantage of the witness discount (as some people say) but to be prunable AND to stay out of the way of monetary transactions, by causing blocksize to stretch rather than take up space. This is why the big blocks are around here in the middle of the chart.

But then the blocksize decreases near the end of the chart. At the present, the chart ends with the average around 1.6MB. What gives? Well, the image inscriptions Casey designed NOT to be intrusive started being replaced by text based inscriptions, at first .sats names, (a kind of dns type thing) and then brc-20s. These seem to NOT stretch blocks, and DO take up space monetary transactions would fill, displacing them (unless, of course they outbid them.) The more monetary users outbid them, the more jpeg inscribed became text-based inscribers (because images were priced out). The more text-based inscriptions, the higher the fees. Endless Cycle?