Suspension block – Do I need to change it & what to change it to.

Recent new owner of 2nd hand 2010 3 speed.

Bike has hardly been used in it's life and slowly learning what can be added/changed to improve it.

The block pictured looks to be a "standard" Brompton block.

YouTube video from Brilliant Bikes – https://youtu.be/hHtBsa3o2Hg?si=DEOx-9oS6Prw72Mj
Has the "standard" block as suited for riders up to 70kg & the firm block for riders over 70kg but also explained that from 2017/2018 , Brompton have just produced one standard block.

I understand there are a number of companies that provide "standard"and "firm" blocks.

My questions are –
Should I swap out the block given it's likely to be 15 yrs old ?

I'm usually under 70kg , so I should go for a "standard" block ?

Is a "firm" block worth buying and trying it out?

What company producing these blocks would you recommend?

Thanks