400 - 1400 (Feudal economics)

1850 - 1920 (Railroad + oil/steel trusts)

1880 - 1982 (ATT)

1950 - 1975 (IBM)

1985 - 2000 (Intel/Microsoft)

2008 - current (Google/Apple/Amazon)

2014 - current (Meta)

It's the nature of technology to produce consolidation, before the next breakthrough occurs and incumbents are typically swept away.

On the plus side, the length of dominant periods seems to be decreasing.

And realistically, data portability standards and pricing for cloud & ability to use independent app stores are the biggest tweaks I'd make.