Best cyclocross bike under £1000 and other CX chat

Could be a good future option but the Land Cruisers are pretty puncture resistant (I seem to live in a very puncture area with sharp bits of flint so put puncture resistance high on list) 'light' MTB tyres tend to puncture about once a week when I used them years ago and tubeless wouldn't stop those sorts of punctures I'm guessing?
I also ride 50% on the road so at the moment am happy with the combination I have. Surprisingly the weight doesn't make as much difference as I thought it would.

You can add glitter etc to your tubeless brew, to aid the sealing of bigger punctures.

But I'm not massively convinced this would work for you TBH.

I ride alpine terrain, with pretty smooth rocks. The pine needles are what plague me.

A) Nothing grips 3" deep ares semi decomposed pine needles.
B) Sooner or later one will work its way into your tyre.

Running 2.55" tyres, at low PSI, and tubeless, helps massively on both counts.