AC wired electric blinds of custom sizes: any alternative to Ichijo’s electric honeycomb shades?

I don't believe those cheap blinds from Ichijo will last more than 5 years. But having wired electric blinds for 10,000 is a really good deal, the problem is their wiring is AC 100V, not the USB 5V most electric curtains expect.

When it's finally time to replace or upgrade the curtains, will I have any alternative or would I be stuck with Ichijo forever (if they even support it by then…)?

Not only the curtains motors fail often, but some curtains are in areas that could get stained or dirty and may need replacement sometimes. I know switchbot roller curtains can have the cloth only replaced, but I doubt Ichijo curtains have that option.