The estimated useful life of each asset category is as follows:
Computer and networking equipment
3-5 years
Leasehold improvements
Shorter of lease term or 5 years
Furniture and fixtures3 years
Office equipment3 years
Internal-use software3 years
Property and equipment, net consisted of the following:
As of December 31,
20222021
(in thousands)
Computer and networking equipment$225,009 $207,575 
Leasehold improvements8,374 4,631 
Furniture and fixtures1,792 1,606 
Office equipment1,176 654 
Internal-use software66,488 40,345 
Property and equipment, gross302,839 254,811 
Accumulated depreciation and amortization(122,461)(87,850)
Property and equipment, net$180,378 $166,961 

About PP&E Disclosures

The PP&E disclosure details a company's physical asset base — land, buildings, machinery, and equipment — along with the depreciation methods and useful life assumptions that determine how these costs flow through the income statement. Capitalization policy thresholds reveal management's judgment on the boundary between expense and asset, directly affecting both reported earnings and asset values.

Key signals: changes in estimated useful lives or depreciation methods can materially shift reported earnings without any operational change. Compare capital expenditures against depreciation expense — when capex consistently trails depreciation, the asset base may be aging and underinvested. Watch for large asset impairments or write-downs that signal overvalued carrying amounts. Asset retirement obligations reveal future environmental or decommissioning costs that are often underappreciated. Compare PP&E intensity (PP&E-to-revenue) against industry peers to assess capital efficiency and competitive positioning.