We can also see that the disadvantages of PR become more significant with larger electorates. For example, the problem of parties horse-trading for months to form a coalition, leaving the country ungoverned. Not so much a problem for a small country like Netherlands (they take 8 months typically) – but a much bigger problem for an important, large economy like UK with a seat in the UNSC with bigger global responsibilities like arming Ukraine.
Another example is the loss of local representation – something obviously mitigated against when you have a regional representative to go with your federal one. Or having too many parties fighting over seats in the parliament. Or too many seats in the parliament even. Both of these are also helped with regional devolution and federation.