By the early 1930s the Duke Class frames, which were of the earlier curved-top type, were becoming uneconomical to repair by patching.

Bus network use today has become highly uneconomical and the ticket prices have been raised repeatedly.

Road steam disappeared through becoming uneconomical to operate, and unpopular with British governments.

By the 1980s production of electricity at South Fremantle had become uneconomical.

Regular grass had become uneconomical, since there was no fuel for power mowers.

It was closed by the National Coal Board in November 1968 and the site was cleared after becoming uneconomical to run.

Many local industries, notably steel, have become uneconomical, and demands for quick investment in pollution-control devices like filters further threaten their financial base.

Mining the ores and minerals of Genellan had become uneconomical.

Nowadays, simply putting to sea in fishing vessels has become uneconomical.

As the competing service of bullock carts gave way to motor vehicles rail patronage declined resulting in both services becoming uneconomical to maintain.