Yeah, sure. That's why the very same article quotes the Commissioner stating that people learning the language often don't find anyone speaking it to actually practice.
"used more than ever" is just a statistical lie. It's based on absolute numbers but to be able to actually use a language, it's the relative numbers that count, i.e. the proportion of Luxembourgish speakers among people being here day to day (600k + 200k frontaliers). That proportion has been dwindling for a long time. And it shows.
(No, I don't vote ADR but I'm fed up with the gaslighting nonetheless.)
As a kid I wasn't too bad at chess but stopped playing. Recently, i.e. some decades later, I created a lichess account and due to some successful tactics and a bit of luck I won my first three games and my (provisional) rating shot up to around 1900 and I was quite surprised and happy.
Afterwards I had the expected losing streak taking me down almost 500 points in only a handful of games...
All is well though, I'm studying a bit and am steadily climbing and should reach 1600 soon.
The linked report in that article is quite detailed and interesting. Seems a reasonable proposal. But then again I only play online and don't have a FIDE rating myself.