Yeah, also using a 2015 Macbook Pro. 256GB SSD is already full and 16 GB non-ECC RAM is small and unreliable.
At least 2015 Macbook Pro 13" is pretty fast and light. I also love the display. Wifi is pretty snappy, download speed from internet is over 250 Mbps, which is enough for me.
I'll swap the internal SSD to 1 or 2 TB model once they become available.