Thanks. Yeah my 470S is still holding strong and I only upgrade the RAM to some 24GB and replaced the two batteries. Now the battery lasts around 4 hours and I'm happy. I do agree that it's showing its age, e.g. having too many tabs in Chrome while playing HD videos in Youtube may stress it a bit, but so far no complaint.

I'll check out the T14s. One of my concerns is: it seems to be more difficult to replace batteries for modern laptops. I tried to remove the battery of the Dell 5550 last night and found it more difficult than the older models. How about the T14s?