That's incorrect. Parts of the site update live. If you have the id64 of the system or body you should see it appear almost immediately on the individual pages (such as on Sol here
https://spansh.co.uk/system/10477373803). EDMC and EDD can both link directly to my site if you look in their settings. The same is true for the market id of a station (for instance here with Wollheim Vision
https://spansh.co.uk/station/3223901184)
The original Neutron Router and Trade Router also update roughly live (within 10 minutes). All of the search pages take roughly a day to update from the dumps (which generate overnight), and so are usually about 24 hours behind. The Fleet Carrier and Galaxy Routers both work off the galaxy dumps so are roughly 24 hours behind as well.