Not sure if I’m imagining it, but my 2014 L405 seems to have gone ever so slightly floaty on the road. Like it's had one too many sherries and now thinks it's a yacht. Could be a sway bar issue. Could be the ACE system having a nap. Either way, I’ll have it checked out, but I’m curious. Has anyone else experienced this, or am I losing my marbles?

The car should tell you if it thinks it’s leaning too much. It throws errors on the dash for that.
You can also look underneath, there will be damp patches where oil leaks from the pipes. V8 or else ...

Has it had the front lower arms replaced in the last few years?
The big rubber bushes at the front of the arm are a consumable item, as per other suspension bushings.

These:

Thanks, probably more than due for those arms and rubber bits.

I’d start with a 4 wheel alignment check on something like a Hunter machine. The check is normally free and you only pay to get adjustments done.
Anything worn will usually show up.