LXLE strikes a balance between having a fully complimented desktop with applications and being lightweight. There are lighter desktops using less RAM, but most come at a cost. Being Ubuntu based means you have repositories full of software + PPA’s + .deb files which makes it super easy to install your favorite software if you chose. There is also tons of help online so if you have a problem you can just search it or copy a terminal output into the browser and have an instant answer.
I was just reading today and apparently it has a lot of tweaking done to it to be very lightweight without sacrificing too much. It supposedly uses less RAM than Lubuntu that it is based from. I can attest to the fact that many bug fixes downstream in LXLE don’t seem to make their way back up to Lubuntu, which is a shame. Perhaps the next two Lubuntu releases will prove much better, as my limited experience with Lubuntu Next was much more positive than vanilla Lubuntu.
One thing you need to watch out for is doing a checksum on the download. Every torrent I had gotten today was messed up, and only my old copy and a fresh download from SourceForge matched the md5sum. I had issues using my 16.04.01 copy because it runs dpkg in the background and was hanging on downloading from sources that stupidly changed a few letters in their stuff which needlessly broke things, and with dpkg hung up with this nonsense you couldn’t run apt or synaptic. I haven’t gone back to try the 16.04.2 download, and the beta for 16.04.3 is available. I manually fixed some of the problems with letters being changed, and had to purge Libre Office (never use it) to fix the rest of the breakage. First time I ever had a major hangup with LXLE, although I probably shouldn’t have been impatient and just waited for 16.04.2 to download.
In any event, I got it running. I haven’t tried Puppy Linux, so I can’t really comment on it. I’d imagine the user base is much smaller than Ubuntu, which might make it harder to find answers. That and easier software installation/availability is why I mostly stick with Ubuntu based distro’s. Other than YouTube and the necessary associated Gmail account, I don’t use Google, not even for searches or their browser, so I have no clue about that ecosystem. If you use it and like it then maybe it is worth consideration.
I also don’t know anything about twitter, so I have no clue how that stuff works. If the machine was capable of using everything in a satisfactory way in the past, then it should be able to do so now, assuming the widgets, plugins, and whatnot haven’t become excessively bloated in the meantime.
I would advise against using an OS that no longer gets security updates. Even if you are like me and have nothing valuable to lose, the machine could become a vector for launching attacks. It may seem silly that a weak netbook could be harmful, but much weaker IoT devices have caused plenty of trouble by being left wide open.
I’m personally partial to netbooks. I strongly dislike the design of a lot of the larger laptops, and have no interest in a machine that is almost like a desktop, but gimped in several ways and way more expensive. I also have no desire to cradle a tablet in my arm like a baby. I gave away my first netbook and upgraded to a Dell Inspiron 11 with an 11.6" touchscreen, a SATA drive that was immediately upgraded to an SSD, and has the touchpad in the center where is belongs instead of those outrageous laptops with numberpads and the touchpad almost fully to the left. Maybe that makes other people happy (like orthopedists) but it’s not for me.
Ditching Win10 on a 5400rpm drive for an SSD with Ubuntu minimal LXQt was super fast. LXQt wasn’t mature enough at the time so eventually I replaced it with LXLE and have no reason to change it anytime soon. You can always try it out with a live USB drive and see if it does what you need. I mostly use Firefox and SNES9X-GTK on my laptop and it’s been rock solid.