Stealth was a one trick pony, and is hopelessly doomed. Radar sees it all, even if all it sees is a hole in the sky where a perfect stealth plane is. “Seeing” is simply a matter of applying enough processing power to what the radar is seeing.
So we are trying to fight exponentially growing computing power that explodes continuously, with a piece of airframe hardware we will can update every 35 years.
Very true. OTOH, stealth reduces detection range and the ability to track so that a stealth aircraft (and I use this as a relative term) can exploit the gaps in a radar chain.
Surfaces and Gaps — Maneuver warfare.
Next step -- optical or quantum computers. But I don't know enough to know if those architectures are well suited or the algorithms used in signal processing; nor enough about the algorithms to know how they are at teasing out true positive signals from very noisy data.