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 It´s not about anyone need to run a node. It´s about anyone CAN run a node. 
That´s the major achievement of BTC. Noone needs to trust anyone. Sure you can if you want to. 
It is important EVERYONE has the choice.
Increasing the block size, adds the possibility that this concept fails. 
That´s why I don´t want the block size to increase. 

I don´t say we have the perfect 2nd layer for now. 
But I know I don´t want to add the requirement for trust to the main layer. 
 The poorest people can’t run a node now so why does that matter they don’t have the choice of running a full node… 
 I think most people today can run a node and without the limit it gets cheaper over time. 
And I would assume they just can´t afford a node, because they don´t have Bitcoin. 

But tbh I want a BTC where I can easily run a node for myself. And this would be in danger if we would increase the block size. 
So for me it is no question if "any of the existing L2 techs or block size increasing". 
It is just a question of "increasing the block size or not". For me it is not an option at all.