I mean I think 2.5g is just becoming the new 1g. my last two motherboards have had 2.5g, Nas hardware is coming with 2.5g standard now, the last usb ethernet dongle I got for my laptop I got 2.5g for a few quid extra. At that point all I need is a switch and I have a free network upgrade. But I do agree with you - if 1g is too slow, more than likely 2.5g is as well, so it's straight to 10g and beyond.
I mean I think 2.5g is just becoming the new 1g. my last two motherboards have had 2.5g, Nas hardware is coming with 2.5g standard now, the last usb ethernet dongle I got for my laptop I got 2.5g for a few quid extra. At that point all I need is a switch and I have a free network upgrade. But I do agree with you - if 1g is too slow, more than likely 2.5g is as well, so it's straight to 10g and beyond.