Even at 160kbps, maybe 1/1.000.000 people can recognice a FLAC vs MP3 trying 10 times (continuous) using expensive headphones and players, 320kbps is overkill, I prefer a FLAC and just encode to Opus.

Right now Opus is better and can be played in web browsers, smartphones, YouTube and Netflix are using that for awhile.

This!

Even 4GB RAM is low for web browsers and they’re gonna struggle, A LOT, even with just one tab open, is going to be painfully slow to not want to use it anymore.

Old laptops like this, don’t have hardware video decoders for YouTube or any video in AVC or HEVC códecs that is used everywhere today.

You can use Gnumeric for spreadsheets and Abiword for docs if Libreoffice is too slow.