After re-installing Vivaldi many a times, can attest that it's sync feature is excellent at remembering passwords (not so with Firefox) and re-instating extensions and more.
Also, with regards to computers, recall purchasing refurbished desktops (nowhere enormous as they used to be) with Win 7 and after about 7 years now, still working full speed. So much faster than Win 10! But buying any electronic stuff today is hard decision. Much like buying a new car. Even if you have the money, you're overwhelmed with so many options!!