Bitcoin has first mover advantage, yes.
Those are pretty bad examples because they generally don't have a network effect (except to a minor extent phones and tablets although the ease of cross platform development has diminished that).
Some examples of early first mover products with network effect would be:
ebay - sure ebay sucks but competitors really couldn't break in because more users = more value and that is hard to beat.
paypal - same thing. people love to bash paypal but surprisingly there is no paypal killer (not talking about Bitcoin just some "better" or less sucky centralized alternative.
gold - picked as commodity money for its properties (divisibility, inert, malliable, etc) however among commodities it is far from the most rare but it lasted due to inertia.
TCP/IP - what a clunked together protocol. horribly ill suited for modern networks (the overhead of small packets of gigabit speed WAN links is insane) but it remains because it would be disruptive to change.
POTS (plain old telephone) - ancient, insanely expensive, low tech and although it is dying (slowly) it lasted decades despite the possibility of something superior replacing it.
All of these benefit from a network effect. The more people using it, the more valuable the system becomes. Bitcoin isn't software, it isn't even a service. Bitcoin is a protocol. There is software than runs the Bitcoin protocol, and there is services which use that software but as a protocol Bitcoin simply needs to be useful enough to lay the foundation.
As far as Bitcoin being nothing but mining. I would point to things like bitpay. bitpay is one of those behind the scenes "boring" companies which unlock value. It allows people to accept Bitcoins easily. That adds to the network effect. If a company can use bitpay to accept Bitcoins easily and other alternatives are harder and almost every potential customer who has "a" cryptocurrency has "the" cryptocurrency then there is little value in accepting alternatives. It reinforces that compounding network effect.
I often get misquoted so to be clear. I am not saying Bitcoin can't be replaced. It certain can. The network effect is a barrier to entry it isn't a force field.