firstly i never said 2.1mb was a limit. i said 2.1 was a more realistic utility
EG i also said 1.2mb but that does not mean minimum limit. is just the expectant range of average.. obviously blocks can be less and more. but do not expect blocks being 4mb filled
expect it more around the 1.2mb-2.1mb area
if howevr they removed a wishy washy bit of code called witness scale factor. then more transactions can be utilitised meaning more transactions, better utility and yes actually getting full use of the 4mb weight.

....

the bit about millions of home users running full nodes on outdated pc's and slower internet causing bottlenecks vs just 10k-100k running full nodes using business lines and regularly updated hardware

imagine it took you 2-14 seconds to ask-receive-validate-relay a block
imagine your a node with 8 connections (ok for home use internet speeds)
node connects to 8 users. and those 8  connect to 8 and so on

8*8*8*8
in 8 second min 56 second max. 4096 nodes have the data

8*8*8*8*8
in 10 second min 70 second max. 32768 nodes have the data

8*8*8*8*8*8
in 12 second min 84 second max. 262144 nodes have the data

8*8*8*8*8*8*8
in 14 second min 94 second max. 2097152 nodes have the data

as you can see it can take upto 1minute and 34 seconds before 2millions people have the data
where as:
imagine where its more for those with 'unlimited fibre' plans and people that upgrade their computer often(4 year as oppose to 10 years)
imagine it took you 2-4 seconds to ask-receive-validate-relay a block

64*64
in 4 second min 8 second max. 4096 nodes have the data

64*64*64
in 6 second min 12 second max. 262144 nodes have the data

as you can see.. home users would take 12-84 seconds to get data to over 200k nodes
those with fibre and more modern updated pcs would take 6-12 seconds to get data to over 200k nodes

...
and to address the personal attack from doomad.
less important, as his noise is usually just insults..
 he is a guy that loves the idea of having funds locked up and is promoting other networks. he loves telling people if they are not happy with the plan then just go away....(facepalm)
 
so he truly hates it when people have an opinion that bitcoin utility, scaling and growth should remain on bitcoin. instead his mindset swaying users to give up using bitcoin and transact in other networks. as those other networks are not blockchained, not limited to bitcoin only coin utility.

in short not sorting out bitcoins network issues and swaying people off network. wont really help people to want to use bitcoin or return to the network.. instead they will just prefer to swap to altcoins within LN and then use other coins network...

much like 19th century banking that vaults up gold makes people play with paper promissory notes and when they withdraw they think gold is too heavy so they withdraw silver coins instead... leaving gold(bitcoin) for those that managed to make going back to bitcoin a hassle via bloated blockchain, bottlenecks, high fee's and low txcount

but dont mind doomad. he does not realise this is a discussion forum. so hates it when people discuss things that are not positive for his group of friends.
kissing ass and being 100% loyal and hide issues under the rug is what he prefers.. it really causes him to get angry when people are more open and honest to be more critical thinking and looking for real solutions and just speaking out when things are not as they seem/promoted