I know this may be a little bit wild, but I’ll attempt to make this suggestion anyway: I quite like Agenda a lot, and it makes me want to stick with the ecosystem for everything. I love Agenda because it’s very flexible, powerful and user-friendly. The UI is top-notch, and UX is very practical. Every detail and scratches seem to matter to Agenda designers.
Agenda is like an iCloud equivalent to me on the realm of information storage. I’d love to be able to create spreadsheets in Agenda itself to make use of auto calculation functionality. If I were to use 3rd party application for my spreadsheet, it slightly disrupts my UX and informational hub as I’d have to keep a record of the external file location/file type/platform in Agenda notes instead of just viewing it straight from Agenda app. Alternatively, if Agenda developers decide to rule out spreadsheet/spreadsheet-like functionality for Agenda, then I propose Agenda to facilitate embedding of external spreadsheets then. But I wouldn’t propose built-in spreadsheets if not because I love Agenda so much and just want to do everything inside Agenda instead of switching around different applications/platforms.
I’ve attached a screenshot of how I use Agenda for personal finance records, and why supporting automated calculations would be useful to me.