I think people buy ETH not about fast transactions but about dev, technology anf community.
We all consider all you mentioned why you are buying, and we who buy ETH believe they are outstanding therefore has a big potential.
Maybe next years ETH can go new ATH following trend up BTC.
Who knows, could even be possible this year if the bull run will last longer.
If i have some money i will buy etherum because is good to investment
Price is still cheap, down from $1300 ATH, so if we will be able to come back at that price, that's instant x10 profit.
However, you might want to take advantage it on short term, a possible 100% return is easy at this movement it's showing now,
we need to see ETH at $500 then that's already money in short term.