The landing strip theory never really died, it just got embarrassing to say out loud at conferences. Honestly though, the counterargument that you couldn't even see them properly from ground level is kind of the whole point isn't it - if they weren't meant to be seen by people walking around, what does that tell you.
I know the mainstream line is "ritual pathways" or "water calendars" or whatever flavour of the month explanation archaeologists are pushing, but none of that fully satisfies me either. The sheer scale of the things combined with the precision is the bit that keeps pulling me back.
Anyone been out there in person? I went a few years back and the scale genuinely reframes the whole debate for you, reading about it online doesnt prepare you for standing next to one of those lines. Would love to hear from people who've done the overflight too - does seeing them from above change how you think about the purpose?