How do you upgrade the UX of a legacy product like Access without pissing off everyone? You can't. Old habits die hard. Modernizing or changing any fundamental UX in Access is probably a very unpopular choice within their current userbase and likely more expensive than starting from scratch.
It's simpler to go and copy Airtable which is already proven to be a successful model/UX and let that product cannibalize the market of your legacy products.