Summary:

Making BTCPayServer easier:

• Better UX
• Node at home
• Mobile app
• Localization

Making BTCPayServer more flexible:

• Plugins
• Powerful API
• Integrations
• Dev ecosystem

Making BTCPayServer free (in both cost and freedom):

• Community
• Contributors
• Businesses
• Local Communities

And a github repo with roadmaps:

• https://github.com/orgs/btcpayserver/projects?type=beta