No it doesn't, ....it screams ''knee jerk reaction'' based on flawed data provided by LFB
I've seen cases of metal DB fires that if were located in typical domestic settings could have taken the the house with it. Now these were American DB's but they were metal construction and the wiring to these DB's were similar to that used in the UK, eg solid conductor T&E. The wiring was virtually completely destroyed for around half a metre beyond the metal DB enclosure.
If metal CU/DB's screams safety, why do you never see a metal consumer unit or DB in any German, French, Dutch, Belgium, etc, etc, etc domestic installation?? Why do they not have the same amount of consumer unit/DB fires, it maybe because there electricians are required to have a damn sight more training than 17 days/5 Weeks?? In fact you'll be lucky to come across a metal DB even in commercial and small industrial situations within Europe, ....Are they somehow using different plastic's to those used in the UK. Strange because the same manufacturers that supply the UK, supply our friends in Europe as well.
The same overall cause of the present problem(s) in the UK, will be transferred to the metal CU's, in fact it could well introduce more problems.....