Is On-Demand App Development a Good Business Opportunity for Startups in 2026?

I'm researching the on-demand app market and trying to understand whether it still presents a strong opportunity for startups.

With consumers increasingly expecting fast, convenient access to services, I'm curious about the business side of launching an on-demand platform.

For those with experience in startups or digital businesses:

• Which on-demand industries currently have the strongest potential?
• What are the biggest costs involved in launching an on-demand platform?
• How important is achieving a strong customer-provider network in the early stages?
• What monetization models tend to work best: commissions, subscriptions, service fees, or a combination?
• What are the biggest mistakes startups should avoid when entering this market?

Would appreciate insights from anyone who has launched, invested in, or evaluated an on-demand technology business.