In what regard are they falling behind? There are lighter laptops, sure. Are there lighter laptops with the same performance, or the same battery, the same ergonomics, the same build quality, or the same screen quality?
I just got a 16" MacBook Pro with an M5 pro chipset and its total pig compared to my 15.6" HP ZBook Power G8.
The only area I can see where Apple is still holding their own is their UI/UX has always been buttery smooth compared to Windows or Linux. Not a fan the new liquid glass, but its still a very smooth running UI regardless.