It is a trade-off for sure. Probably an unavoidable one. In Moneros case increased transactions mean node runners pay (in storage and bandwidth cost -> affects decentralization) less people willing to run nodes. In Bitcoins case limited blocksize mean users of the network pay in transaction fees. The way I look at it is if the network is too expensive to use those users aren't going to run a node anyway (who is going to run a node for a network they can't afford to use or don't use often?) which also affects decentralization. Both arguments are valid imo. Maybe there is a balance or a better solution will be discovered down the road. And about Pubkey yea it's fairly small and I'm not on there often but think it has a lot of potential still. Maybe more people will use it once it isn't invite only anymore 😅