ScorpionCapital,
Your question is a very wise one. Such companies are wide-moat, not narrow-moat (though someone like Morningstar may see things differently).
There are a very limited number of people with the specialized skills to build these products. And it takes years to build them even with those specialized skills. Someone who has a large amount of financing would have to still be able to hire away employees en-masse. It is the accumulated talent and experience that gives them the moat. You might have cases where no college grads have entered that field for 10-15 years because they have been lured somewhere else.
For people who work in the same industry, it is easy to see which moats are wide and which aren't (i.e.. they track where their former classmates and colleagues are working, watercooler conversations).
For people who don't work in that industry, GAAP profits are a good indicator of moats. This raises the question - why do VMW and NOW have almost the same market cap. VMW's FCF is almost the same as NOW's revenue. They say VMW is an on-prem company and is getting bypassed due to the move to the cloud. Yeah, but my reply is would NOW ever be able to make a GAAP profit to justify its $56 B market cap? They are an app on AWS, and the number of AWS app companies are in the hundreds. High-tech wide-moat companies should not have any trouble showing GAAP profits.
It is kind of like the negative-yielding debt. The momentum is the only justification for a while. A bond is supposed to pay interest, stocks are supposed to show a profit (at least eventually). $17T of -ve debt suddenly went to $12T of -ve debt, can't hear even a whimper from Draghi-loving FT.
Also, such specialized skills employees do get hired away by cloud companies like Amazon, Microsoft, Google. They bypass VMW by changing lanes to the cloud (i.e. attack from a different angle). Around 10 years ago VMW debated whether or not they should build their own cloud, and elected not to.
BTW, I am not invested in VMW currently.