I agree almost word by word with you except for this sentence:
Because in example, you’ve response to me at How to book a leasing invoice topic with an answer which it’s almost perfect for me (and I guess for any Tryton user) but could be seen as a not general question:
Following your guideline this would be the sketch for that possible post:
Category: Howto
Sub-category: User
Post title: How to book a leasing invoice
Post description (answer):
In a leasing invoice the amortization is directly booked through one of its invoice lines.
In order to get this working you’ll need the account_asset module installed and the target amortization account setted as fixed asset.
Do not create an asset product, in this case, you will not manage the depreciation.