The term "modular chain" sounds very technical, but the most intuitive changes for ordinary people are just two: cheaper and faster, and the experience feels more like "just a click and it's done." Once execution, data, and consensus are separated, the main chain no longer has to handle everything by itself, and transfers/interactions won't get stuck in a busy state and turn into a PowerPoint.

The drawbacks are also quite real: you might find it harder to figure out which "chain" you're on, with a bunch of bridges and confirmation prompts jumping back and forth, which actually reduces your sense of security...
As someone with mild OCD, I always have to open and check the routing and where it finally lands.

Recently, there's also the trend of social mining and fan coins—"attention is computing power," basically turning traffic into a measurable metric.
With more modularization, the thresholds for issuing tokens and settlement are lower, making it easier to expand this model, but if the metric design is poor, it ultimately becomes a matter of mysticism—just KPI magic.
Anyway, I prefer to look at real on-chain retention and payment paths, rather than being driven by "hype."
That's all for now after finishing my coffee.