Hm, careful though with that.
In a sense, they did (multiple) Galaxy Simulators before. See previous ELITE titles. The current one just happens to try to resemble the actual Galaxy as good as it could with their existing ProcGen tech.
And yes, several others already did. There's even an Indie production featuring the entire known Universe (!) (as good as that's possible).
On the argument "no previous experience", one very important Example comes to my mind : MMO Design.
ED was their first for all I know.
And as expected - even many years into the production - they
still haven't got some of the basics right. They
still struggle with even very simple balancing issues.
The lack of experience shows drastically, having observed them making proverbial "n00b mistakes" instead of proactively learning from other MMO titles and avoid a few simple pot holes. Instead they ran straight into them despite all warnings.
So to me "lack of experience" is a very valid concern. Not a rant - but a concern and given their track record a
very realistic one.
PS.
It gets worse when we i.e. specifically talk about something like FPS or Space Legs.
Simple reason : alot of folks have played dozens of FPS titles in the past, many of them outstanding.
That leads to certain automatic "minimum expectations", simply because the benchmark hurdle has been pushed quite high by all those other titles.
So getting those Players to say a mere "yeah, that's quite okay" alone requires significant Quality Standards already. That's not easy to do.
(and now toss in their traditional tendency to half-bake a brand new Feature consisting of only the most basic of mechanics but lack Gameplay and let that sit untouched for months or even years.... and we're talking a serious risk of botching what is now a Premium DLC right there if one was to assume it was to include FPS/Space Legs)
Anyway, we'll see. Time will tell all by itself