As I circled back the thread, in 2020s I came across rear hub and Sunrace cassette discussion on R&M Birdy Touring. First of all I don’t understand much in it at all. What I know is Sunrace cassette provides decent gear range. But as I understand the hub is a weak point and I’m on borrowed time as I’ll start riding it (I’m about 100kgs). Am I right or hub quality improved by now?

If not what are my options for an upgrade for sturdier setup and similar or wider gearing range?

One of the members mentioned switching to Alfine 11 hub which has even wider range. Is this a good setup and what would be required for such mod? I assume rear wheel will need to be rebuild, which spokes will need to be used, derailer, anything else?