Not all software gets slower.
I have an old Windows 7 laptop and the newest versions of the Chromium browser (Supermium fork, for legacy Windows compatibility) run far faster than any versions of Firefox or Internet Explorer ever did.
I have an old Windows 7 laptop and the newest versions of the Chromium browser (Supermium fork, for legacy Windows compatibility) run far faster than any versions of Firefox or Internet Explorer ever did.
Adding features makes it slower and is inevitable pain of progress. Suggestion we should stop improving things is ridiculous.
I doubt website loads faster. Statistics show that modern websites load slower on modern hardware than old websites used to their respective hardware. I don't see why it would be different on Windows 7.