a) "Client" Organizations are Subject to Limitations – Inasmuch as the slim units do most of their processing at the server, there will be setups where rich media access will be disabled. Some of these concerns are the result of poor performance when simultaneous access to multimedia in this PC is taking place. Heavy and resource-hungry applications like Flash animations and video streaming can slow the performance of both the server and the "client". In corporate organizations where video conferencing and webinars are often carried out, presentation of materials and web-cam/video communications can be adversely affected.
b) Requires Superior Network Connection – Using a network that has latency or network lag issues can greatly affect the "clients". It can even mean rendering the units unusable because the processing will not be fluently transmitted by the server. Such cases make the slim PC very hard to use because the server's response will affect both the visual and the processing performance of the "client". In some workplace setups, even printing tasks have been observed to hog bandwidth, thus, affecting the work going on in other units.
c) Cost Intensive Work Environment – For any plans of converting a regular work station into a thin client work environment, performing comparative cost analysis is strongly advised. Thin setups have been noted to be cost efficient only if employed on a large-scale basis. Comparison of regular workstations using the same number of regular PC units should be made versus a work environment setup that makes use of a dedicated server and the same number of slim PCs.
In some cases the cost of installing the server itself is already far more expensive than all the regular workstations combined. This is aside from the fact that a slim unit can cost as much as a fully-equipped PC. Nevertheless, some argue that the benefits derived, as far as cost and maintenance efficiency are concerned, will eventually offset the initial costs. As a capitalized investment, the costs can be spread out for at least three years.
Still, the expensiveness of the fees covering different licenses, which include software for every station, Client Access Licenses (CAL) for clients and server, as well as tracking and managing licenses, will tie-up a substantial amount of business funds and may take too long to recover. Thus, smaller business organizations are advised to carefully consider such costs before venturing into server-based thin computing.
d) Single Point of Failure Affects All – If the server goes down, every thin client connected to it becomes barely usable. In any event that the server becomes inaccessible, the work processes being handled by all "clients" will come to a standstill and thus, adversely affect business-hour productivity.