I heard very few people are still used Windows XP. Also some people still using Windows 7 when Microsoft end support them. XP and 7 are still working as longer hardware are stable to running for years. I know Windows XP is not safe go on internet due to new exploits due to unpatched vulnerabilities could mess up computer easily. I on Windows 7 (unpatched vulnerabilities) right now and use internet daily did not notice any problems, because I never visit unofficial websites and dangerous websites. I only trust official websites to know where I on right way never give me any troubles.
Kids and teens are never experience on computer to use internet, if what happen use internet then someone download unknown files on computer and open then mess up due to malware, virus, spyware, ransomware, etc. It's very dangerous for kids and teens to use internet what they are doing. Kids and teens must be get out of troubles on internet. Parents and/or guardian must watch on kids and teens what they are doing on computers.
Always remember never open unknown emails, text and weird websites that someone send you in email, text or social websites (Facebook, Twitter, Discord, etc), then delete them. Never download attachments from spam emails, text and social websites that's what stranger or hacker send to you and people without knowledge. Always delete them and report them all of times period!
I used Windows XP in year 2004 until year 2013 then forced buy new HP desktop computer with Windows 7. I still using Windows 7 right now since year 2013. I keep my old computer that come with Windows XP just for old gaming and watch movies from DVD disc. One month ago I bought MSI gaming laptop with RTX 3060 come with Windows 10 Home 64 Bit version 20H1 (disabled auto updates). I had no problems with Windows XP, Windows 7 and Windows 10. I have to go to use Linux next year for myself to learn new operating system, I did tried Linux Mint on my Windows 7 use VMware Workstation program to test many different kind of operating systems. I love to learn Linux compare to Windows and it's really fun for me to use. We must be very careful on internet and keep our safe online.