>I want honest opinions on this, does anyone use full-blown OOP, n-tier development for EVERY application they write?, if it is required from the analysis.

No - most small to medium businesses are still on LANs. They don't want to feed the gravy train of DBA's and high priced priests of the n'Tiered. Besides, there are no more budgets for corporate IT managers to go to conferences to learn how to induce their employers to confuse the situation with the newest, latest and greatest n'Tier gizmo.

Big companies, with big IT departments - have non technical project managers. They're staffed with DBA's and Help desk types. Hardly any real developers. Just enough enough skill sets to sign the dotted line when the next nTier guru comes through the door with a PO. Dilervarables don't matter. Big companies throw away as much as they keep.

All the real action is in the verticle markets of small to medium companies. They could care less about nTier - and they don't want an IT staff.

Now this doesn't mean that nTier is not important or useful - every once in a while, data has to be collected [or distributed] outside the LAN. In these cases (most of the time), a third party service vendor will supply the connection and business objects necessary for the interface.

Look: The internet-highway is built. End of storey. Sure, the are a few more places that an exit ramp or entrance ramp might be needed. But thats it. What happened during the last five/seven years will not happen again for quite a while.