Have you considered Linux mint?
I came to a decision about a year ago that I would need to make a change from Windows 7 to something else in a few years (January 2020). Linux seemed like the logical choice -- it's free, public domain, and it has come a long way over the years. So I decided to take the plunge.
I started by putting Linux in a virtual machine inside of Windows 7. I then went with dual boot. Now, I have Windows in a virtual machine inside of Linux.
I started with Ubuntu, moving through the various Ubuntu flavors, finally settling on Xubuntu. I wasn't totally happy with that, so I ended up on Linux Mint.
I am thoroughly pleased with Linux Mint:
* It is fast.
* It has a solid feel through and through.
* It is extremely easy to install and uninstall a whole lot of free, good-quality software.
* I have total control over updates.
* I have never had to reboot after installing updates.
* The Linux Mint folks aren't gathering my personal information.
* Linux Mint is a whole lot less vulnerable to malware than Windows.
On the negative side:
* I can't get my scanner to work!
* There isn't much high-quality anti-virus software or backup software. Sophos AntiVirus is available, free, and highly-rated. But it isn't as easy to install or use as the Windows stuff.
For those things that I can't do in Linux, I have installed VMWare Workstation Player and set up two virtual machines: one with Windows 7, and the other with Windows 8.1. I installed my scanner software in both VMs; it works without a hitch in both. I plan to install Microsoft Office in the 8.1 VM.
The reason I have a Windows 8.1 VM is because Windows 8.1 will be supported by Microsoft till January of 2023. (In other words, there is a very long time before it goes out of support.) I use Classic Shell, so it's just like Windows 7. But I don't use the VM very much; I'm mainly in Linux. The VM is there only as a necessity, so it doesn't bother me that it's Windows 8.1.