>maybe low radar cross-section isn’t that big of a deal anymore

That's simply not true. There is not a peer or near-peer country that is not developing a variety of low-RCS aircraft.

It’s not as if stealth is foolproof even to radar:

	▲	Reubachi a year ago \| parent [-]
		This incident happened precisely because the human controller activated radar twice to get a read on ground AA targets. This is an operational/user fatigue error rather than a fault of the plane. It was completely blind to any and all AA until it turned on it's radar. Which is to say, f35 Stealth characteristics are worth their weight until exactly the moment a human turns off "lane keep assist" because "they can do it better."