How long will 16GB of RAM remain sufficient?

A friend of mine is looking to buy a new laptop for work, primarily for tasks like Microsoft Office and web browsing. Since laptops tend to be quite expensive in Brazil, she needs something that strikes a balance between affordability and longevity—ideally staying relevant for at least five years without becoming outdated too quickly. Given her budget constraints, she’s considering a model with a current-generation processor and 16GB of RAM. Do you think this setup will provide sufficient performance and longevity, or should she consider any upgrades to ensure it remains viable in the long run?