That's not really a low end desktop, not even today. Most desktops are still being sold with 4Gb of RAM, and when it comes to tablets, the situation is even worse.
My tests are on a Thinkpad X100e which originally came with Windows 7 and ran it fine, with 4Gb, and a HP Stream 8 which originally came with Windows 8.1. Both have, independently, had large numbers of BSoDs since the Fall Update. Responsiveness on both is pretty bad, though has improved with the FU, but still, more often than not, trying to bring up the Start menu takes more than 10 seconds (and sometimes more than a minute) on the X100e, and is a frequent occurrence on the tablet. The notifications bar usually takes so long to come up on both I usually give up on it.
(Want to see smooth and responsive? Try Windows 8.1 on a tablet. Made me never want to use an Android tablet again.)
For obvious reasons, I've not accepted by employer's offer to switch to Windows 10, nor have I upgraded my main PC. This is terrible. Yeah, I get people saying "Well, on my low end bargain basement $10,000 desktop, an 12GHz 16 core Intel i9 with 32Gb of RAM (I mean, who uses anything less these days, right?!" (I kid, but not by much...) "it works fine!" but when you have two devices in front of you that really suck thanks to the Windows 10 update, you tend to believe your own eyes.
Honestly, I still think Microsoft should have released Windows 8.11 (8.1 with a start menu) and then spent a year polishing Windows 10 until it was ready. It shows potential, but in its current form it's garbage.