I tried Thunderbird but it's got a lot going for it. I just want something simple and minimal

Preferably a native app rather than something built with electron

I use Arch Linux

So I'm installing Kubuntu on my friend's old laptop which has a slow hdd, so I decided to go with the minimal install option, only to notice that in the final screen, it's actually removing a lot of packages as indicated in the progress status. Is this intentional?