Depending on computer used, Windows 7 is better than W10, the latter of which uses more resources, otherwise, why would AV/AM scans take 1.5-2x longer, even on a well heeled build? Plus loads slower on computers that shipped with W7 before SP1 was issued, why it's best to stick with W7 or purchase an 8.1 upgrade or OEM version while available. The latter has to be installed on a clean drive.
Yet given the number of those who are running W7 today, I'd say not to worry until EOL for W8.1, if Microsoft thought they had an issue with XP refugees, they've seen nothing until early 2020. I suspect that for most intents & purposes, that most software, to include browsers & security, will remain supported until the EOL for 8.1 in early 2023. Although for all of those who stated a loud 'NO' to the 'free' W10 upgrade, while it seems early, time to be making plans for the future, be it to swallow pride cave in after all, or move to Mac or Linux. The latter of the two isn't as hard as many may think.
Yet for now, the Topic is 'How would you rate Windows 7?'. I'd have to say it's to this date, been the very best of Microsoft, released when they were at the pinnacle of success & also had another successful OS in XP at the same time. Windows 7 transformed the Internet experience & took things to the next level, sadly had just 25% of the wasted cash thrown in the direction of an unpopular Windows 8 towards 7, could've had a true SP2 & other improvements. A lot less bloat, to say the minimum, it's not like we can slipstream the pseudo SP2 into a non-SP1 install media & have more space, while a 120-128GB SSD is all that was once needed for the OS & Office alone, nowadays many of us are pushing the danger zone on these (over 70% full),
While TRIM is an excellent native Windows 7 feature, it does need sufficient free drive space, also good to have around 10GB at the end, unformatted, for overprovisioning. Many overlooks the importance of this, even 5GB unformatted is better than none, the controllers needs room to do it's job, plus stay under the 70% mark on the SSD, preferably 60% or less. Here's the machine I'm on now & this was my first SSD purchased in 2012, back when a SATA-3 128GB model was still around the $150 mark. New install & with just a few commonly used software choices, already at the 35% mark in a single week. http://speccy.piriform.com/results/CGCVNxfmbI7nfswOxccT10t
Note that I saved 24GB on this one for the root & Swap partition of Linux Mint, which I'm dual booting with, Windows Data & Mint /home are on a 1TB WD RE4 HDD. Yet still, I'll eventually have to both uninstall some essentials that I use (no Office install on this one), as well as run Disk Cleanup as Administrator to save space. Note that I created backup images before updates, after updated & after software was installed, so can roll back to an early image if needed, or purchase a low cost 60GB SSD just for the Linux Mint root & Swap partitions. No sense in wasting a 250-256GB SSD on a SATA-2 system that's not my main install, the PC is for my webcam security (motion detection using Linux Mint), am now testing for bugs & still working on the Mint side. Fortunately, Mint & many other Linux root partitions doesn't need to be large, 24GB is plenty, most of the user configuration files are stored in /home, kind of same as Data with Windows, only a lot of hidden files, such as installed software configuration.
As can be seen below, this is an older Windows 7 PC, originally shipped with Vista Business, yet now a pushover either, I feel for a 2008 model PC running 8GB DDR2 RAM & pre 'i' series CPU, my WEI score is respectable.
I'll run the OS until the wheels falls off!